Ancer birdied two of his last three holes for the lowest score of his career, an 8-under 62, giving the 27-year-old Mexican his best shot at a first PGA Tour victory.
Lydia Ko had the round of the morning wave with a 6-under, 66 to move from T86 into the top 10.
Historic Baltusrol Golf Club in Springfield, New Jersey was named Saturday as host of the 2029 PGA Championship, its 10th major men's tournament, and the 2023 Women's PGA Championship.
Ryu was able to increase her lead to two shots with a birdie on the same hole, but her tee shot on the 17th went into the water.
Park started the final round trailing Ryu by four strokes at seven-under, and didn't make a bogey over 20 holes on Sunday.
Following two 69s and a 67, Ryu allowed the two golfers to tie after she carded a 1-over 73, cancelling out four birdies with a bogey and two double bogeys.
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Gilas coach Chot Reyes after the game defended his players . "It's a pretty dark day", he said. The Australians later tweeted that everyone on their team was safe and well .
The 24 year old who earned the LPGA's Rookie of the Year award in 2017 after winning the U.S. Women's Open, defeated two rivals in a playoff to capture the KPMG Women's PGA Championship at Kemper Lakes Sunday.
Nine strokes behind Ryu entering the day, Hataoka almost pulled off one of the biggest comebacks in LPGA Tour history. He won a World Golf Championship in Shanghai in 2010, though the PGA Tour did not recognize the HSBC Champions as an official win until a year later.
Jessica Korda, who shot 68, and Angel Yin (71) finished three strokes back of the playoff in a tie for fourth. I just did 100-per cent effort every shot, every putt and still, you know, I like looking at the positive side.
Ryu, who opened the round in a three-way tie atop the leaderboard, shot a 4-under 67 and heads into Sunday's final round with a three-shot lead over Canada's Brooke Henderson, the 2016 tournament victor.
Henderson said: "I kind of struggled a little bit with my putter, which is disappointing, but I think just kind of get better in my head and just go out tomorrow and make a lot of good shots and see if I can make some birdies".
But that lead disappeared on the very next hole, the par-3 17th, where Ryu found water off the tee.
Park slammed home a 7-foot birdie putt to win, as Ryu's birdie effort rolled past the left edge of the cup. Hataoka, who was already in the clubhouse after a 64, and Park were within one shot of the lead at that point.