3 second call

[mwalker13004]

I was watching the Kansas/Colorado Men's game last night and nearly fell out of my chair. Kansas up by 6 in the 2nd half. Colorado has the ball in their frontcourt. All the action at the 3 point line and as a shot goes up the whistle blows and the Lead Whistle calls a 3 second violation off ball as the shot is made. Is that the rarest call in the Mens game or was it a justified whistle. I have always held that whistle unless obvious advantage gained by camping in the paint. This call was off ball and play was uneffected. Any thoughts??