The prop was due to return to action against Cardiff.
Tadhg Furlong’s suffered another set-back in his recovery from injury.
Leinster say the prop is not progressing like they’d wish with a calf injury, and he’ll miss this weekend’s game with Cardiff.
Meanwhile, Ciaran Parker requires surgery to a thumb injury sustained in the win over Edinburgh.
But Ryan Baird, Sean Cronin and Rory O’Loughlin are all back in contention.