After a while, McGraw's wife and co-headliner Faith Hill came out to tell the crowd McGraw could not finish the concert.
Approximately 15 minutes later, Hill came onstage with 10 members of McGraw's band, to make an announcement about what had happened to her husband. "And I apologize, but I made the decision that he can not come back out on stage".
McGraw was in Ireland as part of a three-day, three-city country music festival called Country to Country. Tim reportedly dropped to his knees, then sat down.
The country star was seen for the first time since the incident Monday morning as he was leaving a building.
Tim McGraw looked to be in good health as he and Faith Hill left the establishment.
A representative for McGraw tells Rolling Stone that McGraw was "suffering from dehydration".
Hill then proceeded to take over to close out the evening, asking the crowd if they could sing a song together and going into an a cappella rendition of "What a Friend We Have in Jesus". Many fans at the show and at home sent out love and support to McGraw on Twitter.
McGraw and Hill will begin a 29-city United States tour in Richmond, Virginia, on May 31.
Tim has previously revealed that music is his "saviour".
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