Use this hook to execute custom code after an order is deleted. It passes the order ID and order object being deleted.

do_action("pmpro_delete_order", int $order->id, MemberOrder $order);

Parameters

$order->id

int

$order

MemberOrder

Source

File: https://github.com/strangerstudios/paid-memberships-pro/blob/master/classes/class.memberorder.php