Jeongeun Lee6 extended her lead at the top of the Evian Championship leaderboard to five shots heading into the final round of action.
The South Korean had equalled the record for the lowest round ever played at a major by a man or woman in the second round and carded a three-under 68 at the Evian Resort Golf Club on Saturday.
Lee6 is now on the brink of winning a second major title following her 2019 U.S. Women's Open triumph.
She carded three bogeys in round three, but four birdies along with an eagle at the par-four 11th ensured the 25-year-old remains in a commanding position at the summit at 18 under.
"I'm satisfied with my result today because I did miss some shots a little bit, but I got up and down well," Lee6 said.
"At the 2019 U.S. Women's Open I didn't lead going into the final round, but this tournament I'm leading so it's a little bit different. I'm going to be a little bit nervous."
First-round co-leader Yealimi Noh is outright second after birdying her final three holes for a four-under 67 to reach 13 under, while former world number one Lydia Ko is a shot further back.
Minjee Lee birdied her last four holes to card a joint-low 65, along with Brittany Altomare and Maria Fassi, as the Australian moved into a tie for fourth with Ayaka Furue and Pajaree Anannarukarn.
The chasing pack will require a major slip-up from Lee6 to have any chance of lifting the trophy on Sunday, with five strokes the largest deficit ever overturned at the tournament in France.