Kapur, who had a great start this week with a 67, finished at one-over 289 and in a disappointing tied 52nd place.
Kapur double bogeyed the fifth and then bogeyed the 11th and 17th for a 76.
However, adding to the huge success Asian golf has had this season so far, Thailand's Kiradech Aphibarnrat beat Li Hao-Tong from becoming the first Chinese player to win an European Tour event on home soil.
Then Kiradech sensationally eagled the 17th to move from two behind to 12-under and tie Li.
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An excellent approach from a fairway bunker gave the Thai a putt to win the tournament in regulation play, but his effort slipped to the right of the hole, meaning he and Li would return to the 18th tee.
In the play-off, Kiradech repeated his approach to find the middle of the green, while Li left himself a much longer putt.
Kiradech's only previous European Tour victory had come at the 2013 Maybank Malaysian Open.
Tommy Fleetwood, who finished runner-up at Genzon Golf Club in last year's Volvo China Open, occupied third place on 11-under par after closing with a round of 69.
"I had a chance to win in 72 holes, but the putt in the play-off is the best putt I have ever made in my life. I've been struggling for a year. I lost my coach (Natpasit Chokthanasart, who died in December 2013), then changed my equipment. There have been lots of changes since I won, so I'm so happy to get my hands on another trophy," Kiradech said.