Kodaline took to Twitter yesterday morning to confirm the news, leaving fans "gutted".
Kodaline were forced to cancel shows at Castlebar, Killarney and Wexford on the 12, 13 and 14 December respectively.
Despite this news, the Swords rockers have reasurred fans that their tickets will still be valid for their rescheduled shows. They also said that fans will get their money back if they are unable to reschedule these gigs.
This news has left fans understandably "gutted".
One wrote, "Just landed in Ireland and I see this. Glad I booked a Dublin gig as well. Hope they feel better soon".
"Absolutely gutted just boarding the plane to come see you guys Pensive face. Hope for a speedy recovery", another added.
Another fan stated, "Absolutely gutted just boarding the plane to come see you guys Pensive face. Hope for a speedy recovery".