Woocommerce Display 3 Products in a Row

woocommerce-3-products-in-a-row.php

<?php

add_filter( 'loop_shop_columns', 'wc_loop_shop_columns', 1, 10 );

/*
* Return a new number of maximum columns for shop archives
* @param int Original value
* @return int New number of columns
*/
function wc_loop_shop_columns( $number_columns ) {
  return 3;
}