After morning tee times on Saturday were brought forward to 7:15 a.m. local time, play was halted at 10 because of strong, gusting winds on the County Louth course at Baltray.
Graeme McDowell, who shot a course-record 11-under 61 on Friday, withdrew because of shin splints in his right leg.
He said he first felt the problem Thursday and was in discomfort Friday when he limped up the final fairway to complete his round.
Irish amateur Shane Lowry took a two-stroke lead into the third round after his 10-under 62 Friday.
He had played just one hole when play was suspended.