There Are Two Discrete Reasons

Reasons why one may kill oneself.  The first is that life has become simply intolerable.  That is not a choice, it's a compulsion in the moment.

The second is a co-optation, a wresting from God of the choice of time and place.  But a philosopher might say that in this case it was God's plan all along for you to choose, and also to make that particular choice.  The arrow of the Lord will find its Maker's mark.