Scott Hend of Australia shot a 70 to retain the lead after the third round of the Thailand Classic on the par-72 Black Mountain Golf Course.
The 43-year-old Hend produced five birdies for a three day total of 14 under-par 202 to take a two-shot advantage Saturday over Peter Uihlein of the United States.
"I knew it was going to be a tough day, very windy so I'm very pleased," said Hend, in search of his eight Asian Tour title. "It's not very often you get a chance to lead a tournament on a Saturday night, let alone on a Sunday."
Uihlein, the first-round leader, shot four birdies for a 69 and 12-under-par 204.
Belgium's Thomas Pieters scored the lowest round, a bogey-free 66 for a three-day total of 205 to share third place with Sweden's Pelle Edberg.