It will be the second year in a row that the Tallaght team will play Vikingur Reykjavík
For the second year in-a-row Shamrock Rovers have drawn the league winners of Iceland in the Champions League.
Víkingur Reykjavík will host the first leg on the ninth or tenth of July before the second leg in Tallaght a week later.
The Hoops were knocked out of last season's Champions League at the first hurdle by another Icelandic side, Breidablik.
Meanwhile in the UEFA Europa Conference League, both Shelbourne and
Shels have been drawn against St. Josephs whilst Derry will play FCB Magpies.
St Patrick’s Athletic have received a bye into the second round.