function get_comment_excerpt( $comment_ID = 0 ) {
  $comment = get_comment( $comment_ID );

  if ( ! post_password_required( $comment->comment_post_ID ) ) {
    $comment_text = strip_tags( str_replace( array( "\n", "\r" ), ' ', $comment->comment_content ) );
  } else {
    $comment_text = __( 'Password protected' );
  }

  /* translators: Maximum number of words used in a comment excerpt. */
  $comment_excerpt_length = (int) _x( '20', 'comment_excerpt_length' );

  
/**
 * Filters the maximum number of words used in the comment excerpt.
 *
 * @since 4.4.0
 *
 * @param int $comment_excerpt_length The amount of words you want to display in the comment excerpt.
 */
  $comment_excerpt_length = apply_filters( 'comment_excerpt_length', $comment_excerpt_length );

  $excerpt = wp_trim_words( $comment_text, $comment_excerpt_length, '…' );

  
/**
 * Filters the retrieved comment excerpt.
 *
 * @since 1.5.0
 * @since 4.1.0 The `$comment_ID` and `$comment` parameters were added.
 *
 * @param string     $excerpt    The comment excerpt text.
 * @param int        $comment_ID The comment ID.
 * @param WP_Comment $comment    The comment object.
 */
  return apply_filters( 'get_comment_excerpt', $excerpt, $comment->comment_ID, $comment );
}