diff --git a/core/includes/theme.inc b/core/includes/theme.inc
index 41c9e85e4d2f0152da723e55d330d16de8aaf1aa..a7c8166a7506035a1a1c20a5f0176c1c690614c3 100644
--- a/core/includes/theme.inc
+++ b/core/includes/theme.inc
@@ -1659,7 +1659,15 @@ function template_preprocess_field_multiple_value_form(&$variables) {
       ),
     );
 
-    $variables['description'] = $element['#description'];
+    if (!empty($element['#description'])) {
+      $description_id = $element['#attributes']['aria-describedby'];
+      $description_attributes['id'] = $description_id;
+      $variables['description']['attributes'] = new Attribute($description_attributes);
+      $variables['description']['content'] = $element['#description'];
+
+      // Add the description's id to the table aria attributes.
+      $variables['table']['#attributes']['aria-describedby'] = $element['#attributes']['aria-describedby'];
+    }
   }
   else {
     $variables['elements'] = array();
diff --git a/core/modules/field/src/Tests/FormTest.php b/core/modules/field/src/Tests/FormTest.php
index 0ae049bbb8fa3f9a72a5539336cf5b0ccb2cc99f..9e70b3821cec0b40d76a1981fd3dd17e98584c9a 100644
--- a/core/modules/field/src/Tests/FormTest.php
+++ b/core/modules/field/src/Tests/FormTest.php
@@ -254,6 +254,10 @@ function testFieldFormUnlimited() {
     $this->assertFieldByName("{$field_name}[0][value]", '', 'Widget 1 is displayed');
     $this->assertNoField("{$field_name}[1][value]", 'No extraneous widget is displayed');
 
+    // Check if aria-describedby attribute is placed on multiple value widgets.
+    $elements = $this->xpath('//table[@id="field-unlimited-values" and @aria-describedby="edit-field-unlimited--description"]');
+    $this->assertTrue(isset($elements[0]), t('aria-describedby attribute is properly placed on multiple value widgets.'));
+
     // Press 'add more' button -> 2 widgets.
     $this->drupalPostForm(NULL, array(), t('Add another item'));
     $this->assertFieldByName("{$field_name}[0][value]", '', 'Widget 1 is displayed');
diff --git a/core/modules/system/templates/field-multiple-value-form.html.twig b/core/modules/system/templates/field-multiple-value-form.html.twig
index 348621ce98ca965a656b0d68ef8d057efb598fa7..1108d6eb76b270b175841078f4860abaea73d772 100644
--- a/core/modules/system/templates/field-multiple-value-form.html.twig
+++ b/core/modules/system/templates/field-multiple-value-form.html.twig
@@ -11,7 +11,9 @@
  *
  * Available variables when there are multiple fields.
  * - table: Table of field items.
- * - description: Description text for the form element.
+ * - description: The description element containing the following properties:
+ *   - content: The description content of the form element.
+ *   - attributes: HTML attributes to apply to the description container.
  * - button: "Add another item" button.
  *
  * @see template_preprocess_field_multiple_value_form()
@@ -22,8 +24,8 @@
 {% if multiple %}
   <div class="js-form-item form-item">
     {{ table }}
-    {% if description %}
-      <div class="description">{{ description }}</div>
+    {% if description.content %}
+      <div{{ description.attributes.addClass('description') }} >{{ description.content }}</div>
     {% endif %}
     {% if button %}
       <div class="clearfix">{{ button }}</div>
diff --git a/core/themes/classy/templates/form/field-multiple-value-form.html.twig b/core/themes/classy/templates/form/field-multiple-value-form.html.twig
index bcc7b89bb58187325da4129e7015b5ff5b44b586..6ac2ddf41a3ea4aaf470f600b2999911c93a54ec 100644
--- a/core/themes/classy/templates/form/field-multiple-value-form.html.twig
+++ b/core/themes/classy/templates/form/field-multiple-value-form.html.twig
@@ -11,7 +11,9 @@
  *
  * Available variables when there are multiple fields.
  * - table: Table of field items.
- * - description: Description text for the form element.
+ * - description: The description element containing the following properties:
+ *   - content: The description content of the form element.
+ *   - attributes: HTML attributes to apply to the description container.
  * - button: "Add another item" button.
  *
  * @see template_preprocess_field_multiple_value_form()
@@ -20,8 +22,8 @@
 {% if multiple %}
   <div class="js-form-item form-item">
     {{ table }}
-    {% if description %}
-      <div class="description">{{ description }}</div>
+    {% if description.content %}
+      <div{{ description.attributes.addClass('description') }} >{{ description.content }}</div>
     {% endif %}
     {% if button %}
       <div class="clearfix">{{ button }}</div>