Unusual 3 second call

[billyu2]

In last night's tournament game I was the C, A1 had the ball on the opposite side of the court and A3 was in the lane by the block nearest me. I was ready to call a violation but A1 had already started a drive to the basket and was on his way up for the lay-in. Seeing he was about to be rejected, A1pulled the ball down and while still airborne tried to make an off-balance pass toward the corner on my side. The ball glanced off the bottom of the backboard, hit the floor and was caught by A3 who would have had an easy put-back but I quickly called A3 for a 3 second violation. My thinking was team control never ended and by this time, A3 had been in the lane for a lot more than :03. Later, I got to thinking of the recent discussion of throwing the ball off a team's own backboard and if team control ended. If so, then perhaps I was wrong. Would appreciate your opinions.