Dundalk will face Celje from Slovenia in the first qualifying round of the UEFA Champions League.
The Lilywhites were drawn away from home, and as Slovenia is not on the Irish green list, the game will take place in a neutral venue which is decided upon by the home team.
Celje have chosen Újpest in Hungary for the behind closed doors game.
Formal confirmation is expected from UEFA shortly. The Szusza Ferenc Stadium is just outside the capital city Budapest.
The match will take place on Wednesday 19 August.
First-round ties are taking place over one leg because of the competition's revised schedule due to the impact of the coronavirus pandemic.
It represents the most difficult possible draw for Dundalk. They had a 50% chance of playing a team on the green list and missed out on more favourable games against teams from countries like the Faroe Islands, Finland and Estonia.
The Lilywhites will receive a travel grant from UEFA to help cover cost of chartering a plane, which will be sizeable as the game takes place in just10 days.
However there will also be the cost of hiring the venue which is split between both clubs.
Meanwhile, Celtic will play at home to Icelandic club KR Reykjavik.
Celtic Park will likely host the game but there is still a possibility the fixture could be staged at a neutral venue.
The Hoops' only previous meeting with KR Reykjavik came in a Champions League qualifying tie in the 2014-15 season when they progressed 5-0 on aggregate.
UEFA will conduct the draw for the second qualifying round on Monday, with those matches scheduled to be played on August 25 or 26.
Northern Ireland champions Linfield will face an away trip to Legia Warsaw should get past Kosova's Drita on Tuesday.
We have been drawn against NK Celje from Slovenia in the first qualifying round of the UEFA Champions League. A date, venue and kick-off time will be announced in due course. pic.twitter.com/C5wiSFNWV6— DundalkFC (@DundalkFC) August 9, 2020
The winners of the ties progress to the second round, while losers enter the UEFA Europa League second qualifying round.
Subscribe to WatchLOI to stream 55 Airtricity League matches and selected FAI Cup games this season.