Two Donegal minor footballers and two members of the team's backroom staff are understood to have been handed eight-week bans following incidents at the Ulster MFC game against Armagh.
The names of the suspended personnel have not been made public.
A Donegal GAA statement confirmed that the county had received communication from the Ulster Council arising from a disciplinary matter in the game.
"There will be no further comment at this time," said the Donegal statement.
"CLG Dhun na nGall would respectively request that consideration be given to the fact that names of underage players should not be speculated upon while consideration is being given to an appeal process."
Last year's Ulster winners Donegal defeated Armagh 2-14 to 0-7 in the game at the Athletic Grounds on 31 May to set up a provincial semi-final meeting with Derry.