The 32-year-old, who has been one of United's stand out performers this season, will miss game against Everton, Derby and Stoke in the coming weeks.
Young has decided not to contest the charge but did query the suspension. "I can fall down but it was really unusual because I didn't expect that from him". With the pair marking each other at a corner, Young elbowed Tadic in the stomach. I can fall down but it was really odd because I didn't expect that from him'.
They would also exit the Carabao Cup at the hands of Championship side Bristol City with a strong side and are now on a three-game drawing streak with the likes of Leicester, Burnley and Southampton holding the Red Devils.
Swansea City's Kyle Naughton was also charged for a separate an unrelated incident in their 2-1 victory over Watford on Saturday.
Several United players felt as though they should have been awarded a penalty when the ball struck Maya Yoshida's hand in the first half but Pawson waved away all protests.
Romelu Lukaku was taken off early in the draw with Southampton after a clash of heads, while fellow forward Zlatan Ibrahimovic has a knee problem.
"The fact that we don't play the [Carabao Cup] semi-final is a good thing for us", said Mourinho.
Jose Mourinho looks at the end of his tether after a miserable December has seen his Manchester United side go from title contenders to third place.