The teams play in two ODIs this week in Malahide
John Anderson and Max Sorensen have been called into Ireland's squad for the KPC Group ODI series against Sri Lanka, which starts at Malahide on Thursday, replacing Niall O'Brien and Stuart Thompson.
O'Brien, the Leicestershire wicketkeeper, sustained a grade two tear of his left calf while batting against Warwickshire last week, and is likely to be out of action for between four and six weeks.
Thompson, meanwhile, will also miss the series for personal reasons. Cricket Ireland requests that he be given privacy during this time, and will be making no further comment at this stage.
Their places in the squad will be taken by Anderson, who has been in prolific form for Merrion, and his Leinster Lightning colleague Sorensen - The Hills seam bowling all-rounder.
"John and Max were unlucky to miss out in the original squad selection," said Head Coach John Bracewell. "John's been in superb form this season scoring heavily in domestic and inter-provincial cricket. The injuries to Andrew Balbirnie and Niall give him an opportunity to come into the squad and if selected, I'm certain he'll perform well.
"Max bowled excellently in the win against Scotland A last week, taking six wickets in the game. He impressed me with the pace and the bounce he generated. It's clear he's recovered well from his recent illness and injury and it's good to have him back firing on all cylinders."
Ireland play Sri Lanka on Thursday and Saturday at Malahide - action in both games in the KPC Group Series starts at 10.45am.