diff --git a/backend/capellacollab/projects/toolmodels/modelsources/t4c/routes.py b/backend/capellacollab/projects/toolmodels/modelsources/t4c/routes.py
index 3bb4969e6e..916bbd0bbb 100644
--- a/backend/capellacollab/projects/toolmodels/modelsources/t4c/routes.py
+++ b/backend/capellacollab/projects/toolmodels/modelsources/t4c/routes.py
@@ -79,7 +79,7 @@ def create_t4c_model(
     ),
     db: orm.Session = fastapi.Depends(database.get_db),
 ):
-    instance = settings_t4c_injecatbles.get_existing_instance(
+    instance = settings_t4c_injecatbles.get_existing_unarchived_instance(
         body.t4c_instance_id, db
     )
     repository = (
diff --git a/backend/capellacollab/settings/modelsources/t4c/injectables.py b/backend/capellacollab/settings/modelsources/t4c/injectables.py
index 3334eb0a1a..0449141f03 100644
--- a/backend/capellacollab/settings/modelsources/t4c/injectables.py
+++ b/backend/capellacollab/settings/modelsources/t4c/injectables.py
@@ -22,3 +22,18 @@ def get_existing_instance(
             "reason": f"The t4c instance with the id {t4c_instance_id} does not exist.",
         },
     )
+
+
+def get_existing_unarchived_instance(
+    t4c_instance_id: int, db: orm.Session = fastapi.Depends(database.get_db)
+):
+    t4c_instance = get_existing_instance(t4c_instance_id, db)
+    if t4c_instance.is_archived:
+        raise fastapi.HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail={
+                "reason": f"The T4C instance identified by {t4c_instance.id} is archived, thus prohibiting the execution of the requested operation."
+            },
+        )
+
+    return t4c_instance
diff --git a/frontend/src/app/projects/models/model-source/t4c/manage-t4c-model/manage-t4c-model.component.html b/frontend/src/app/projects/models/model-source/t4c/manage-t4c-model/manage-t4c-model.component.html
index c3cb95aadb..7a4d27a247 100644
--- a/frontend/src/app/projects/models/model-source/t4c/manage-t4c-model/manage-t4c-model.component.html
+++ b/frontend/src/app/projects/models/model-source/t4c/manage-t4c-model/manage-t4c-model.component.html
@@ -24,6 +24,10 @@
             <mat-option
               *ngFor="let instance of t4cInstanceService.t4cInstances$ | async"
               [value]="instance.id"
+              [disabled]="instance.is_archived"
+              [matTooltip]="
+                instance.is_archived ? 'This instance is archived' : ''
+              "
             >
               {{ instance.name }}
             </mat-option>
diff --git a/frontend/src/app/services/settings/t4c-instance.service.ts b/frontend/src/app/services/settings/t4c-instance.service.ts
index 5c2588c9fa..6313d331ef 100644
--- a/frontend/src/app/services/settings/t4c-instance.service.ts
+++ b/frontend/src/app/services/settings/t4c-instance.service.ts
@@ -5,7 +5,7 @@
 
 import { HttpClient } from '@angular/common/http';
 import { Injectable } from '@angular/core';
-import { BehaviorSubject, Observable, tap } from 'rxjs';
+import { BehaviorSubject, Observable, map, tap } from 'rxjs';
 import { environment } from 'src/environments/environment';
 
 export type Protocol = 'tcp' | 'ssl' | 'ws' | 'wss';
@@ -25,6 +25,8 @@ export type BaseT4CInstance = {
   is_archived: boolean;
 };
 
+export type PatchT4CInstance = Partial<BaseT4CInstance>;
+
 export type NewT4CInstance = BaseT4CInstance & {
   name: string;
 };
@@ -59,6 +61,12 @@ export class T4CInstanceService {
   );
   public readonly t4cInstance$ = this._t4cInstance.asObservable();
 
+  public readonly unarchivedT4cInstances$ = this._t4cInstances.pipe(
+    map((t4cInstances) =>
+      t4cInstances?.filter((t4cInstance) => !t4cInstance.is_archived)
+    )
+  );
+
   loadInstances(): void {
     this.http.get<T4CInstance[]>(this.baseUrl).subscribe({
       next: (instances) => this._t4cInstances.next(instances),
@@ -84,7 +92,7 @@ export class T4CInstanceService {
 
   updateInstance(
     instanceId: number,
-    instance: BaseT4CInstance
+    instance: PatchT4CInstance
   ): Observable<T4CInstance> {
     return this.http
       .patch<T4CInstance>(this.urlFactory(instanceId), instance)
diff --git a/frontend/src/app/settings/modelsources/t4c-settings/edit-t4c-instance/edit-t4c-instance.component.html b/frontend/src/app/settings/modelsources/t4c-settings/edit-t4c-instance/edit-t4c-instance.component.html
index c441f7e62a..28389af23f 100644
--- a/frontend/src/app/settings/modelsources/t4c-settings/edit-t4c-instance/edit-t4c-instance.component.html
+++ b/frontend/src/app/settings/modelsources/t4c-settings/edit-t4c-instance/edit-t4c-instance.component.html
@@ -176,9 +176,27 @@ <h2 *ngIf="!existing">Add a Team4Capella instance</h2>
           </button>
           <button mat-flat-button type="submit" color="primary">Submit</button>
         </div>
-        <div *ngIf="!editing && existing" class="flex justify-between">
-          <button mat-flat-button color="primary" (click)="enableEditing()">
-            Edit
+        <div
+          *ngIf="
+            !editing &&
+            existing &&
+            (t4cInstanceService.t4cInstance$ | async) !== undefined
+          "
+          class="flex justify-between"
+        >
+          <div *ngIf="!isArchived; else archivePlaceholder">
+            <button mat-flat-button color="primary" (click)="enableEditing()">
+              Edit
+            </button>
+          </div>
+          <ng-template #archivePlaceholder>
+            <div class="grow"></div>
+          </ng-template>
+          <button mat-flat-button color="primary" (click)="toggleArchive()">
+            <mat-icon class="mat-icon-position left">{{
+              this.isArchived ? "unarchive" : "archive"
+            }}</mat-icon>
+            {{ this.isArchived ? "Unarchive" : "Archive" }}
           </button>
         </div>
         <div *ngIf="!existing" class="text-right">
diff --git a/frontend/src/app/settings/modelsources/t4c-settings/edit-t4c-instance/edit-t4c-instance.component.ts b/frontend/src/app/settings/modelsources/t4c-settings/edit-t4c-instance/edit-t4c-instance.component.ts
index 150c3a698a..12377e2c5c 100644
--- a/frontend/src/app/settings/modelsources/t4c-settings/edit-t4c-instance/edit-t4c-instance.component.ts
+++ b/frontend/src/app/settings/modelsources/t4c-settings/edit-t4c-instance/edit-t4c-instance.component.ts
@@ -11,8 +11,8 @@ import { filter, map } from 'rxjs';
 import { BreadcrumbsService } from 'src/app/general/breadcrumbs/breadcrumbs.service';
 import { ToastService } from 'src/app/helpers/toast/toast.service';
 import {
-  BaseT4CInstance,
   NewT4CInstance,
+  PatchT4CInstance,
   Protocol,
   T4CInstanceService,
 } from 'src/app/services/settings/t4c-instance.service';
@@ -34,6 +34,8 @@ export class EditT4CInstanceComponent implements OnInit, OnDestroy {
   instanceId?: number;
   capellaVersions?: ToolVersion[];
 
+  isArchived?: boolean;
+
   portValidators = [
     Validators.pattern(/^\d*$/),
     Validators.min(0),
@@ -91,6 +93,7 @@ export class EditT4CInstanceComponent implements OnInit, OnDestroy {
       .pipe(untilDestroyed(this), filter(Boolean))
       .subscribe((t4cInstance) => {
         t4cInstance.password = '***********';
+        this.isArchived = t4cInstance.is_archived;
         this.form.patchValue(t4cInstance);
         this.breadcrumbsService.updatePlaceholder({ t4cInstance });
       });
@@ -139,7 +142,7 @@ export class EditT4CInstanceComponent implements OnInit, OnDestroy {
   update(): void {
     if (this.form.valid && this.instanceId) {
       this.t4cInstanceService
-        .updateInstance(this.instanceId, this.form.value as BaseT4CInstance)
+        .updateInstance(this.instanceId, this.form.value as PatchT4CInstance)
         .subscribe((instance) => {
           this.editing = false;
           this.form.disable();
@@ -151,6 +154,24 @@ export class EditT4CInstanceComponent implements OnInit, OnDestroy {
     }
   }
 
+  toggleArchive(): void {
+    if (this.instanceId) {
+      this.t4cInstanceService
+        .updateInstance(this.instanceId, {
+          is_archived: !this.isArchived,
+        })
+        .subscribe((instance) => {
+          this.isArchived = instance.is_archived;
+          this.toastService.showSuccess(
+            'Instance updated',
+            `The instance “${instance.name}” is now ${
+              this.isArchived ? 'archived' : 'unarchived'
+            }.`
+          );
+        });
+    }
+  }
+
   submit(): void {
     if (this.existing) {
       this.update();
diff --git a/frontend/src/app/settings/modelsources/t4c-settings/t4c-settings.component.html b/frontend/src/app/settings/modelsources/t4c-settings/t4c-settings.component.html
index 804c43b309..cce15fc2e6 100644
--- a/frontend/src/app/settings/modelsources/t4c-settings/t4c-settings.component.html
+++ b/frontend/src/app/settings/modelsources/t4c-settings/t4c-settings.component.html
@@ -19,7 +19,11 @@
     *ngFor="let instance of t4cInstanceService.t4cInstances$ | async"
     [routerLink]="['instance', instance.id]"
   >
-    <mat-card matRipple class="mat-card-overview">
+    <mat-card
+      matRipple
+      class="mat-card-overview"
+      [ngClass]="{ 'bg-gray-300': instance.is_archived }"
+    >
       <div class="header">{{ instance.name }}</div>
       <div class="content">
         <mat-icon class="aligned">tag</mat-icon> <b> Capella version:</b>
@@ -28,6 +32,13 @@
         <mat-icon class="aligned">link</mat-icon><b> Host:</b>
         {{ instance.protocol }}://{{ instance.host }}:{{ instance.port }}
       </div>
+
+      <div
+        *ngIf="instance.is_archived"
+        class="fixed bottom-2 right-2 text-right text-stone-500"
+      >
+        Archived
+      </div>
     </mat-card>
   </a>
 </article>