Game ends with intentional foul

[loners4me]

Team A down by 3 with 5 seconds left. A1 advances ball and is gathering himself to shoot a long 3 pointer. B1 hits him like a mack truck and he hits the floor. He did get the shot off and an intentional foul is called. Horn sounds, basket is no good. We clear the lanes and give the shooter 3 shots. He missed the first...game over. I learned coach told them to intentionally foul (which is a seperate sportsmanship topic). Was this handled correctly?