Jeongeun Lee6 will take a five-shot lead into the final round of the Amundi Evian Championship, while Ireland's Leona Maguire and Stephanie Meadow are 15 and 17 shots further back respectively.
The South Korean, who took control of the tournament with a scintillating 61 on Friday, carded four birdies and an eagle in her third round for a three-under-par 68 as she extended her three-shot overnight advantage.
American teenager Yealimi Noh birdied the final three holes to move into second place with a four-under-par 67 while New Zealand's Lydia Ko was third on 12 under after a 68.
Minjee Lee holed eight birdies, including five on the back nine, to move into a three-way tie for fourth on 11 under alongside Ayaka Furue and Pajaree Anannarukarn.
Thailand's Ariya Jutanugarn, who had been joint second at the halfway stage, fell back to seventh and 10 under with a one-over-par 73.
England's Charley Hull shot 66 to move up to joint eighth with Hyo-Joo Kim and In-Gee Chun on nine under.
Maguire started Saturday's round in a share of 25th alongside fellow Tokyo 2020 Team Ireland member Meadow.
The Co Cavan native carded a 71 which included three birdies and three bogeys apiece to stay on three under but consequently slipped back into a tie for 32nd.
Meadow is two shots further back after a 73 which also included three birdies and three bogeys. But the Co Antrim golfer double bogeyed the Par-4 13th.
Maguire and Meadow, who both represented Ireland at the Rio 2016 Olympics, will participate at Tokyo 2020 after the end of the Evian Championship with the women's individual stroke play tournament scheduled to tee off on Wednesday, 4 August at Kasumigaseki Country Club.