Select Shooter on Intentional Foul?

[BballRookie]

Hard push in the back. Easy intentional foul call.

As the player (who was pushed in the back) goes to the line for the intentional three throws the coached asked if he could make a sub for the shooter(?). I took a deep breath and before I could answer he said nevermind.

On a technical you can sub a player in, but on an intentional?

I know, I know. Get the rule book out and all that stuff. Can one of our wise old vets just give me answer and a reference.

Thanks guys.