Connacht will be without Ultan Dillane for the rest of the season.
The powerful lock missed the Six Nations due a shoulder injury and the IRFU announced earlier this month that he required surgery.
Dillan has now had the operation, but hopes of an early recovery have been dashed.
The Westerners says he will miss the remainder of their campaign.
He could also be a doubt for Ireland’s tour to Japan in June.
Connacht will also be without injured wing Matt Healy, centre Peter Robb and back row Nepia Fox-Matamua for Saturday’s Pro 12 game in Glasgow, but Kieran Marmion is available for selection.
The scrum half is back from international duty, having made his first Six Nations start in Ireland’s win over England.
Dave Foley is leaving Munster.
The 28 year old second row is joining French club Pau in the summer.
The Clonmel lock will be linking up with fellow Munster men James Coughlan, Paddy Butler and Sean Dougall at the Top 14 club.
Foley played twice for Ireland in 2014, coming off the bench during the 26-23 win over Australia.
He has made 84 appearances for the Southern Province, but will not appear in the red shirt again as he will spend the rest of the season recovering from a wrist injury.