Hyo Joo Kim endured an up-and-down third round but still maintained her three-shot lead at the Lotte Championship in Ewa Beach, Hawaii.
The 26-year-old South Korean shot an even-par 72 at Hoakalei Country Club to sit at 10-under 206 heading into the final round.
The United States’ Brianna Do and Japan’s Hinako Shibuno are tied for second at seven under.
Stephanie Kyriacou and Sarah Kemp are the best-placed Australians with a share of 21st place at one-under.
Kemp started the day well placed at seven-under but four bogeys on the front nine and further dropped shots at the 17th and 18th holes appear to have ruined her chances of making a charge in the final round.
Kim had 11 pars and two bogeys among her first 13 holes on Friday, but birdies on the par-4 14th hole and the par-5 18th allowed her to pull back to par for the round.
Do, a 32-year-old veteran who has never made the top 10 of an LPGA Tour event, birdied her first three holes and finished with six birdies and one bogey.
Conversely, Shibuno got off to a slow start, making par on each hole of the front nine. She then birdied Nos. 10, 11, 14 and 17 to cap a bogey-free round.
Defending champion Lydia Ko of New Zealand is tied for 33rd — just as she was following the second round — after a 73 left her at one over.
The 10th edition of the event is being played at Hoakalei Country Club for the first time.