Hi,

1) Create Business Rule, When to Run condition as below,

2) In Advance section, use gs.eventQueue('eventName',current object, parm1, parm2); method

Note: i have set Parm1 has assignment group of current record.

3) Create an event 'record.delete.notif' in System policy-->Events-->Registry.

4) Create Notification, with When to send should be "event fired" and give event name as 'record.delete.notif'.

a) Whom to send, you can select "Event Parm1"  

b)what it cotains, Use the current object access the record fields.

Please Mark it correct/helpful, If it answers your query.

Regards,

Sachin