diff --git a/block_opencast.php b/block_opencast.php
index 80579525..e708163d 100644
--- a/block_opencast.php
+++ b/block_opencast.php
@@ -156,22 +156,13 @@ public function get_content() {
     }
 
     /**
-     * Deletes the series mappings when a block is deleted.
-     * @return bool
-     * @throws coding_exception
+     * Perform actions when the block instance is deleting.
+     * @see block_opencast_pre_block_delete method in lib.php, by which completes this function purpose by providing
+     * a new confirmation message.
+     * @return void
      */
     public function instance_delete() {
-        global $COURSE;
-        $success = true;
-
-        $mappings = seriesmapping::get_records(['courseid' => $COURSE->id]);
-        foreach ($mappings as $mapping) {
-            if (!$mapping->delete()) {
-                $success = false;
-            }
-        }
-
-        return $success;
+        // Please see block_opencast_pre_block_delete before implementing anything here.
     }
 
     /**
@@ -196,4 +187,93 @@ public function instance_create() {
         }
         return true;
     }
+
+    /**
+     * Return a block_contents object representing the full contents of this block.
+     *
+     * This internally calls ->get_content(), and then adds the editing controls etc.
+     *
+     * Overwritten method from parent class (block_base)
+     *
+     * @param \core_renderer $output
+     * @return block_contents a representation of the block, for rendering.
+     */
+    public function get_content_for_output($output) {
+        global $COURSE;
+        // Get the block_contents object from parent class.
+        $bc = parent::get_content_for_output($output);
+
+        // We prepare the data to use and replace the existing action link contents.
+        $title = $this->title;
+        $defaultdeletestr = get_string('deleteblock', 'block', $this->title);
+
+        // Check if the block_contents has controls.
+        if (!empty($bc->controls)) {
+
+            // We filter the controls to find the delete action link.
+            $deleteactionfiltered = array_filter($bc->controls, function ($actionlink) use ($defaultdeletestr, $title) {
+                // Get the text from action link.
+                $actionlinktext = $actionlink->text;
+                // Get the text if it is a type of lang_string via __toString.
+                if ($actionlinktext instanceof \lang_string) {
+                    $actionlinktext = $actionlinktext->__toString();
+                }
+                return $actionlinktext === $defaultdeletestr;
+            });
+
+            // In case the delete action link could be found, we try to replace its properties.
+            if (!empty($deleteactionfiltered)) {
+                $index = key($deleteactionfiltered);
+                $deleteaction = reset($deleteactionfiltered);
+                // Replace the action link's text.
+                if (isset($deleteaction->text)) {
+                    $deleteaction->text = get_string('delete_block_action_item_keepseriesmapping_text', 'block_opencast');
+                }
+                if (isset($deleteaction->attributes)) {
+                    if (isset($deleteaction->attributes['data-modal-title-str'])) {
+                        $deleteaction->attributes['data-modal-title-str'] = json_encode(
+                            ['deletecheck_keepseriesmapping_title_modal', 'block_opencast']
+                        );
+                    }
+                    if (isset($deleteaction->attributes['data-modal-content-str'])) {
+                        $deleteaction->attributes['data-modal-content-str'] = json_encode(
+                            ['deletecheck_keepseriesmapping_content_modal', 'block_opencast']
+                        );
+                    }
+                }
+                $bc->controls[$index] = $deleteaction;
+            }
+
+            // A new action link item that is meant to delete the seariemapping as well,
+            // only by passing the 'removeseriesmapping' flag set to 1.
+            $deleteurl = new moodle_url('/course/view.php',
+                [
+                    'id' => $COURSE->id,
+                    'sesskey' => sesskey(),
+                    'bui_deleteid' => $this->instance->id,
+                    'bui_confirm' => 1,
+                    'removeseriesmapping' => 1
+                ]
+            );
+            $str = get_string('delete_block_action_item_noseriesmapping_text', 'block_opencast');
+            $deleteseriesmappinglink = new action_menu_link_secondary(
+                $deleteurl,
+                new pix_icon('t/delete', $str, 'moodle', array('class' => 'iconsmall', 'title' => '')),
+                $str,
+                [
+                    'class' => 'editing_delete',
+                    'data-modal' => 'confirmation',
+                    'data-modal-title-str' => json_encode(['deletecheck_noseriesmapping_title_modal', 'block_opencast']),
+                    'data-modal-content-str' => json_encode(['deletecheck_noseriesmapping_content_modal', 'block_opencast']),
+                    'data-modal-yes-button-str' => json_encode(['delete', 'core']),
+                    'data-modal-toast' => 'true',
+                    'data-modal-toast-confirmation-str' => json_encode(['deleteblockinprogress', 'block', $title]),
+                    'data-modal-destination' => $deleteurl->out(false),
+                ]
+            );
+
+            $bc->controls[] = $deleteseriesmappinglink;
+        }
+        return $bc;
+    }
 }
diff --git a/lang/en/block_opencast.php b/lang/en/block_opencast.php
index d5aa5ad4..db8d92a8 100644
--- a/lang/en/block_opencast.php
+++ b/lang/en/block_opencast.php
@@ -891,5 +891,12 @@
 $string['directaccess_copy_success'] = 'The direct access link has been successfully copied to clipboard.';
 $string['directaccess_copytoclipboard_unavialable'] = 'It seems that your browser does not support the copy to clipboard functionality, try to copy the link manually from the dropdown item.';
 $string['opencast:autocompleteteacherroles'] = 'Teacher roles to be extracted and provided in the autocomplete list';
+$string['delete_block_action_item_keepseriesmapping_text'] = 'Remove Opencast Block (keep series mapping)';
+$string['deletecheck_keepseriesmapping_title_modal'] = 'Remove Opencast Block (keep series mapping)?';
+$string['deletecheck_keepseriesmapping_content_modal'] = 'Are you sure you want to remove the Opencast block from the course and keep the series mapping to the course?<br /> <small>With this option you are able to re-add the block to this course and have all series and events in place again</small>';
+$string['delete_block_action_item_noseriesmapping_text'] = 'Remove Opencast Block (remove series mapping)';
+$string['deletecheck_noseriesmapping_title_modal'] = 'Remove Opencast Block (remove series mapping)?';
+$string['deletecheck_noseriesmapping_content_modal'] = 'Are you sure you want to remove the Opencast block from the course and also remove all the mapping to the series and events?<br /> <small>You are NOT able to retrieve the series connected to this course, in case you want to add the block back.</small>';
+$string['error_block_delete_seriesmapping'] = 'Unfortunately, there was an error during course series mapping deletion, please contact the system administrator.';
 // Deprecated since version 2021062300.
 $string['video_already_uploaded'] = 'Video already uploaded';
diff --git a/lib.php b/lib.php
index 43c7e421..15896824 100644
--- a/lib.php
+++ b/lib.php
@@ -105,3 +105,40 @@ function block_opencast_pre_course_delete(stdClass $course) {
         $mapping->delete();
     }
 }
+
+
+/**
+ * Pre-delete block hook to show a confirmation message or to perform cleaup the related series and videos.
+ *
+ * @param object $instance a row from the block_instances table
+ *
+ * @throws moodle_exception
+ */
+function block_opencast_pre_block_delete($instance) {
+
+    // We make sure if the deleting block is Opencast block, otherwise we do nothing!
+    if ($instance->blockname !== 'opencast') {
+        return;
+    }
+
+    // Get the course and context base don block instance parentcontextid.
+    list($context, $course, $cm) = get_context_info_array($instance->parentcontextid);
+
+    // We get the flag 'removeseriesmapping' to decide whether to delete the series mapping.
+    $removeseriesmapping = optional_param('removeseriesmapping', null, PARAM_INT);
+    // We only perform the series mapping deletion if the flag is set to 1.
+    if ($removeseriesmapping === 1) {
+        $success = true;
+        $mappings = seriesmapping::get_records(['courseid' => $course->id]);
+        foreach ($mappings as $mapping) {
+            if (!$mapping->delete()) {
+                $success = false;
+            }
+        }
+        if (!$success) {
+            throw new moodle_exception('error_block_delete_seriesmapping', 'block_opencast');
+        }
+    }
+    // We let the process continue if the flag 'removeseriesmapping' is set to 0,
+    // which means it is decided not to delete series mapping.
+}
diff --git a/tests/behat/block_opencast_manageseries.feature b/tests/behat/block_opencast_manageseries.feature
index b49fabbe..384a35f0 100644
--- a/tests/behat/block_opencast_manageseries.feature
+++ b/tests/behat/block_opencast_manageseries.feature
@@ -105,3 +105,21 @@ Feature: Manage series as Teacher
     And I click on "Import series" "button" in the ".modal" "css_element"
     And I wait "2" seconds
     Then I should not see "The series could not be imported"
+
+  @javascript
+  Scenario: When manually deleting a block, teacher is able to decide whether to keep or to delete the series mapping by two different action items
+    When I open the action menu in "Opencast Videos" "block"
+    And I click on "Remove Opencast Block (keep series mapping)" "link"
+    And I click on "Delete" "button" in the "Remove Opencast Block (keep series mapping)?" "dialogue"
+    Then I add the "Opencast Videos" block
+    And I click on "Go to overview..." "link"
+    And I click on "Manage series" "link"
+    Then I should see "Test series"
+    When I am on "Course 1" course homepage with editing mode on
+    When I open the action menu in "Opencast Videos" "block"
+    And I click on "Remove Opencast Block (remove series mapping)" "link"
+    And I click on "Delete" "button" in the "Remove Opencast Block (remove series mapping)?" "dialogue"
+    Then I add the "Opencast Videos" block
+    And I click on "Go to overview..." "link"
+    And I click on "Manage series" "link"
+    Then I should see "No series is defined yet."