The club have called it "a serious error of judgement."
Dundalk have confirmed that their entire squad have since returned negative results from COVID-19 tests.
The Lilywhites' match against Finn Harps on Friday will go ahead as planned following consultation with the H-S-E.

Tuesday Morning Sports Update
All Ireland Football Championship Opening Round Fixtures Confirmed
Tommy O'Brien Among Injury Doubts For Leinster's Champion Cup Final On Saturday
Monday Morning Sports Update
Sunday Evening Sports Update
Mourinho's Benefica Go Unbeaten but Miss Title
Brave Kildare Fall Short in Leinster Ladies Final
Chelsea Appoint Xabi Alonso as New Manager