Interference - Foul fly

[Zepp]

This is a spin-off of a recent thread on Interference.

ASA rules. Runner on 3rd (R3). 2 outs. Batter(B4) hits a lazy fly halfway down the 3rd baseline in foul territory.
R3 is off on the pitch and collides with pitcher who would have caught foul fly with routine effort.
Runner (R3) is out on the interference.
Question is who leads off the next inning?

Looking for rule reference(s) that indicate whether or not B4 "completed her turn at bat" on the foul fly.

If it was less than 2 outs...easy...interference on routine foul or fair fly...both runner and batter are called out and B5 is next to bat