Field template for display mode of referenced paragraph
Implement hook_theme_suggestions_alter like in the other answer and you can find everything you need in the $variables.



The following snippet will add the template suggestion for the view mode of the referenced paragraphs. Note that this will probably only make sense as long as you use only one paragraph type OR all multiple paragraph types have the same view mode configured.

/**
 * Implements hook_theme_suggestions_HOOK_alter().
 */
function MYMODULE_theme_suggestions_field_alter(array &amp;$suggestions, array $variables) {

  $element = $variables['element'];

  if ($element['#field_type'] == 'entity_reference_revisions') {

    foreach ($element as $key =&gt; $value) {
      if (is_numeric($key) &amp;&amp; isset($value['#paragraph'])) {

        $paragraph = $value;
        $suggestions[] = 'field__' . $element['#field_name'] . '__paragraph__' . $paragraph['#view_mode'];
      }
    };
  }
}


Seems you can implement that from you theme's *.theme file as well.



I guess the same logic works for any entity (node etc.) reference as well.