diff --git a/core/modules/menu_link_content/src/Form/MenuLinkContentForm.php b/core/modules/menu_link_content/src/Form/MenuLinkContentForm.php
index e9dd15dbeea582e355c219a640269bd1584de6e1..f57404f5379edac344e1a274c94f19309cf508d1 100644
--- a/core/modules/menu_link_content/src/Form/MenuLinkContentForm.php
+++ b/core/modules/menu_link_content/src/Form/MenuLinkContentForm.php
@@ -91,7 +91,16 @@ public function form(array $form, FormStateInterface $form_state) {
 
     $default = $this->entity->getMenuName() . ':' . $this->entity->getParentId();
     $id = $this->entity->isNew() ? '' : $this->entity->getPluginId();
-    $form['menu_parent'] = $this->menuParentSelector->parentSelectElement($default, $id);
+    if ($this->entity->isNew()) {
+      $menu_id = $this->entity->getMenuName();
+      $menu = $this->entityTypeManager->getStorage('menu')->load($menu_id);
+      $form['menu_parent'] = $this->menuParentSelector->parentSelectElement($default, $id, [
+        $menu_id => $menu->label(),
+      ]);
+    }
+    else {
+      $form['menu_parent'] = $this->menuParentSelector->parentSelectElement($default, $id);
+    }
     $form['menu_parent']['#weight'] = 10;
     $form['menu_parent']['#title'] = $this->t('Parent link');
     $form['menu_parent']['#description'] = $this->t('The maximum depth for a link and all its children is fixed. Some menu links may not be available as parents if selecting them would exceed this limit.');
diff --git a/core/modules/menu_link_content/tests/src/Functional/MenuLinkContentFormTest.php b/core/modules/menu_link_content/tests/src/Functional/MenuLinkContentFormTest.php
index e5d8070439e495695c078dba20f44ce6912cae56..fa4d8cc11a19c077716fb2b3e718e124000dab26 100644
--- a/core/modules/menu_link_content/tests/src/Functional/MenuLinkContentFormTest.php
+++ b/core/modules/menu_link_content/tests/src/Functional/MenuLinkContentFormTest.php
@@ -72,6 +72,9 @@ public function testMenuLinkContentFormLinkToAnyPage() {
     $this->drupalGet('/admin/structure/menu/item/' . $menu_link->id() . '/edit');
     $this->assertSession()->statusCodeEquals(200);
 
+    // Test that other menus are available when editing existing menu link.
+    $this->assertSession()->optionExists('edit-menu-parent', 'main:');
+
     $this->drupalLogin($this->basicUser);
 
     $this->drupalGet('/admin/structure/menu/item/' . $menu_link->id() . '/edit');
@@ -83,6 +86,8 @@ public function testMenuLinkContentFormLinkToAnyPage() {
    */
   public function testMenuLinkContentForm() {
     $this->drupalGet('admin/structure/menu/manage/admin/add');
+    // Test that other menus are not available when creating a new menu link.
+    $this->assertSession()->optionNotExists('edit-menu-parent', 'main:');
     $option = $this->assertSession()->optionExists('edit-menu-parent', 'admin:');
     $this->assertTrue($option->isSelected());
     // Test that the field description is present.
diff --git a/core/modules/menu_ui/tests/src/Functional/MenuUiTest.php b/core/modules/menu_ui/tests/src/Functional/MenuUiTest.php
index 9cb7d40d03a7f17a2275fe53cba343ae5d8251ba..92e607bf14302b0e6c742d653ff1aef3292ce4d1 100644
--- a/core/modules/menu_ui/tests/src/Functional/MenuUiTest.php
+++ b/core/modules/menu_ui/tests/src/Functional/MenuUiTest.php
@@ -806,7 +806,7 @@ public function checkInvalidParentMenuLinks() {
         'expanded[value]' => FALSE,
         'weight[0][value]' => '0',
       ];
-      $this->drupalGet("admin/structure/menu/manage/{$this->menu->id()}/add");
+      $this->drupalGet("admin/structure/menu/manage/tools/add");
       $this->submitForm($edit, 'Save');
       $menu_links = \Drupal::entityTypeManager()->getStorage('menu_link_content')->loadByProperties(['title' => $title]);
       $last_link = reset($menu_links);
@@ -814,7 +814,7 @@ public function checkInvalidParentMenuLinks() {
     }
 
     // The last link cannot be a parent in the new menu link form.
-    $this->drupalGet('admin/structure/menu/manage/admin/add');
+    $this->drupalGet('admin/structure/menu/manage/tools/add');
     $value = 'tools:' . $last_link->getPluginId();
     $this->assertSession()->optionNotExists('edit-menu-parent', $value);