Illegal substitution?

[Nevadaref]

Originally Posted by Adam

You're right, but are you going to enforce 3-3-4 in this case. Remember, you have no idea who A6 was coming in for. No one does, since it was never announced before he was recalled by his coach.

Not sure how long you've been officiating, but when I started subs reporting to the table had to state their own number plus the number of the player being replaced. This requirement was dropped a few years into my officiating time.
This made such situations clearer and enforcement simple. Sadly the NFHS opted to be less precise.

The guiding principle has to be that there are always five players, other than during an intermission or if fewer are eligible. So when a sub enters and becomes a player one of the previous five ceases to be. Yes, I would enforce that rule. I would charge a technical foul if needed.