Hi!
You may need to ask them how to place a shortcode or a PHP code there, because this:
<?php echo do_shortcode(‘[wd_asp id=3]‘); ?>
..is pure PHP. It calls the do_shortcode function to execute the given shortcode. You can try directly invoking the shortcode handled, but it is basically the same thing:
WD_ASP_Search_Shortcode::getInstance()->handle(array('id' => 3));