Try to edit the file basel/inc/shortcodes.php and customize the function basel_shortcode_products(); as shown on screenshot http://prntscr.com/jwress

Add the following code

if ( 'yes' === get_option( 'woocommerce_hide_out_of_stock_items' ) ) {
	$args['meta_query'][] = array( 'key' => '_stock_status', 'value' => 'outofstock', 'compare' => 'NOT IN' );
}