no call or foul ball?

[KathyCG]

First time this has happened to me and I can't find a ruling in the ASA rule book:

Tree branches overhang backstop. Foul ball goes up, and in coming down hits a branch, deflecting the ball away from the catcher, who would have caught it.

Just a foul ball? Dead ball/strike? Dead ball and the infamous do-over?

Thanks!