Wait, whats happened? Haven't been following the Copa America so forgive my ignorance.
Neymar received a yellow early on in the match, meaning he'd miss the 3rd game due to suspension as he had a previous yellow from the first game.= 1 game ban
He then kicked the ball at a Colombian player after the whistle due to them celebrating, he received a red for this.= 2nd game ban (would probably get 3 game ban for that alone in some leagues).
Now they have rescinded the red card i assume and only misses the next game. They are basically saying 'Tournament needs its star players, and we will do everything in our utmost to keep it that way'