His nine-iron approach to 10 feet set up a closing 3, sealing a 3-under 69 and an 18-under total — one shot ahead of Korea’s Wooyoung Cho, who fired 65.

Thailand’s Jazz Janewattananond (72), Panuphol Pittarayat (69), Ekpharit Wu (67) and India’s Sachin Baisoya (62) shared third at 16-under. The US$500,000 event at Kensville Golf Resort, near Ahmedabad, was jointly sanctioned with the new Indian Golf Premier League.

Poosit and Jazz began the final round tied for the lead, but Poosit edged clear with a resilient back nine. Starting the week 81st on the Order of Merit, he needed to push toward the top 65 to keep his card. His victory moves him to 29th and earns a one-year exemption.

“Amazing, I can’t believe it,” said Poosit, whose previous best was T3 at last year’s SJM Macao Open. After turning in 1-over with two bogeys and a birdie, he surged with three straight birdies from the 12th before his decisive birdie on 18. “I came here to try and improve my ranking… to secure my card this week with the win, it’s beyond my dreams.” He credited a recent loft-and-lie change to his putter: “It made such a big difference – I started holing putts.”

Cho, who led at halfway, bounced back from a difficult third round for his best Asian Tour finish. “My feeling yesterday was very, very bad… Today I tried just to focus on my swing,” he said. Late birdies gave him a chance: “I didn’t think Poosit would make a birdie on the last hole… so it’s okay.”

Jazz, chasing his eighth Asian Tour win, faded late. “Just scruffy… Didn’t hit it close enough, and the putts didn't want to go in,” he said. “Just not hitting good enough consistently to win yet.”

The Asian Tour now breaks for one week before the season-ending US$1 million Saudi Open presented by PIF at Dirab Golf & Country Club in Riyadh, where American John Catlin defends his title.