Spain's Pablo Larrazabal shot a 66 to finish 17 under par and claim a second BMW International Open title in Munich by a single stroke, with Michael Hoey having to settle for a tie of seventh.
Hoey’s final round of 70 left him on 13 under par, tied with Sweden’s Peter Hanson.
Back at the top of the leaderboard, Larrazabal carded six birdies, five of them on the front nine, to edge away from Henrik Stenson as his three on the par-four 16th proved decisive in a tense finish.
Sweden's Stenson had piled on the pressure with a fourth-round 65, but the clubhouse leader could only look on helplessly as the Spaniard safely negotiated the closing holes to win his fourth European Tour event with a total of 271.
Of the other Irish, Darren Clarke ended up on nine under after a final round of 69, Shane Lowry carded a 73 to end up seven under, Damien McGrane’s 72 meant he finished six under, Peter Lawrie shot 70 to end up two strokes further back, and Kevin Phelan shot 75 to finish two over par.
England's Chris Paisley, who had started the day two shots behind overnight leader James Morrison, came agonisingly close to a share of second place a further shot behind on 15 under when he left a long putt just short on the 18th, while compatriot David Howell matched Stenson's 65 to end the tournament in a tie for ninth.
Morrison's hopes evaporated as he shot 77 on a day when he did not make a single birdie to slip into a six-way tie for 11th place.
