diff --git a/src/Mod/Assembly/CommandInsertLink.py b/src/Mod/Assembly/CommandInsertLink.py
index ab43123901..f817d0c891 100644
--- a/src/Mod/Assembly/CommandInsertLink.py
+++ b/src/Mod/Assembly/CommandInsertLink.py
@@ -96,6 +96,14 @@ class CommandInsertLink:
         Gui.Control.showDialog(self.panel)
 
 
+class InsertLinkObserver:
+    def __init__(self, callback):
+        self.callback = callback
+
+    def slotDeletedObject(self, obj):
+        self.callback(obj)
+
+
 class TaskAssemblyInsertLink(QtCore.QObject):
     def __init__(self, assembly, view):
         super().__init__()
@@ -134,6 +142,10 @@ class TaskAssemblyInsertLink(QtCore.QObject):
 
         App.setActiveTransaction("Insert Component")
 
+        # Listen for external deletions to keep the list in sync
+        self.docObserver = InsertLinkObserver(self.onObjectDeleted)
+        App.addDocumentObserver(self.docObserver)
+
     def accept(self):
         self.deactivated()
 
@@ -182,6 +194,10 @@ class TaskAssemblyInsertLink(QtCore.QObject):
         return True
 
     def deactivated(self):
+        if hasattr(self, "docObserver") and self.docObserver:
+            App.removeDocumentObserver(self.docObserver)
+            self.docObserver = None
+
         pref = Preferences.preferences()
         pref.SetBool("InsertShowOnlyParts", self.form.CheckBox_ShowOnlyParts.isChecked())
         pref.SetBool("InsertRigidSubAssemblies", self.form.CheckBox_RigidSubAsm.isChecked())
@@ -563,16 +579,12 @@ class TaskAssemblyInsertLink(QtCore.QObject):
                     stack_item = self.insertionStack[i]
 
                     if stack_item["item"] == item:
-
-                        self.totalTranslation -= stack_item["translation"]
                         obj = stack_item["addedObject"]
-                        if self.groundedObj == obj:
-                            self.groundedJoint.Document.removeObject(self.groundedJoint.Name)
-                        UtilsAssembly.removeObjAndChilds(obj)
 
-                        self.decrement_counter(item)
-                        del self.insertionStack[i]
-                        item.setSelected(False)
+                        # ONLY remove the object from the document.
+                        # The Observer (onObjectDeleted) will handle the rest.
+                        if obj and obj.Document:
+                            UtilsAssembly.removeObjAndChilds(obj)
 
                         return True
             else:
@@ -637,6 +649,41 @@ class TaskAssemblyInsertLink(QtCore.QObject):
             translation = 10
         return App.Vector(translation, translation, translation)
 
+    def onObjectDeleted(self, obj):
+        """
+        Handles cleanup when an object is deleted (via Right Click OR Tree View).
+        """
+        # Iterate backwards to safely delete
+        for i in reversed(range(len(self.insertionStack))):
+            stack_item = self.insertionStack[i]
+
+            if stack_item["addedObject"] == obj:
+                # 1. Revert translation
+                self.totalTranslation -= stack_item["translation"]
+
+                # 2. Update UI counter
+                item = stack_item["item"]
+                self.decrement_counter(item)
+
+                # 3. Handle Grounded Joint cleanup
+                if self.groundedObj == obj:
+                    if self.groundedJoint:
+                        try:
+                            # Remove the joint if it still exists
+                            if self.groundedJoint.Document:
+                                self.groundedJoint.Document.removeObject(self.groundedJoint.Name)
+                        except Exception:
+                            pass
+                    self.groundedObj = None
+                    self.groundedJoint = None
+
+                # 4. Remove from stack
+                del self.insertionStack[i]
+
+                # 5. Clear selection
+                if item:
+                    item.setSelected(False)
+
 
 if App.GuiUp:
     Gui.addCommand("Assembly_InsertLink", CommandInsertLink())