Kapur totalled two-over 286 in the tournament that is played over three courses with the final round at the Old Course, St. Andrews.
Meanwhile, Oliver Wilson produced a gutsy final round display to finally claim a maiden European Tour title and reignite his career.
Rory McIlroy, Richie Ramsay and Tommy Fleetwood finished in a tie for second at 16-under 272, one behind Wilson.
The 34 year old Englishman represented Europe at The 2008 Ryder Cup and was a nine-time runner-up on The European Tour between 2006 and 2009, reaching the top 50 on The Official World Golf Ranking in the process.