Stacy Lewis held on to lead Amy Yang by one stroke at the
Leading overnight by three shots after a second-round 64, Lewis had three straight bogeys in the front nine before the American fired a five-foot eagle on the 15th hole to regain the lead from South Korea's Yang.
Third-ranked Lewis had five bogeys — including at the 18th — and two birdies at the Siam Country Club Pattaya Old Course for a three-day total of 13-under 203.
Sandra Gal of Germany shot 68 for third place, a further stroke behind Yang.
"It was a bit all over the place today," Lewis said. "Hit some good shots, hit some shots too far." Yang bogeyed Nos. 12 and 14 before back-to-back birdies on the 17th and 18th holes saw her finish with a 71.
Wallie Coetsee takes a two-shot lead into the final round of the Joburg Open after a 2-under 70 in Johannesburg, South Africa.
Chasing a first European Tour title, Coetsee extended his overnight lead by a shot with five birdies and two bogeys to go 14 under par at Royal Johannesburg and Kensington.