Locate a WordPress plugin template.

template-functions.php

<?php
/**
 * Locate template.
 *
 * Locate the called template.
 * Search Order:
 * 1. /themes/theme/templates/$template_name
 * 2. /themes/theme/$template_name
 * 3. /plugins/plugin/templates/$template_name.
 *
 * @since 1.0.0
 *
 * @param   string  $template_name          Template to load.
 * @param   string  $string $template_path  Path to templates.
 * @param   string  $default_path           Default path to template files.
 * @return  string                          Path to the template file.
 */
function PLUGIN_locate_template( $template_name, $template_path = '', $default_path = '' ) {

  // Set variable to search in the templates folder of theme.
  if ( ! $template_path ) :
    $template_path = 'templates/';
  endif;

  // Set default plugin templates path.
  if ( ! $default_path ) :
    $default_path = plugin_dir_path( __FILE__ ) . 'templates/'; // Path to the template folder
  endif;

  // Search template file in theme folder.
  $template = locate_template( array(
    $template_path . $template_name,
    $template_name
  ) );

  // Get plugins template file.
  if ( ! $template ) :
    $template = $default_path . $template_name;
  endif;

  return apply_filters( 'PLUGIN_locate_template', $template, $template_name, $template_path, $default_path );

}