Sarah Lee climbed into a share of the lead at the Korean Ladies Masters after carding an even-par 72 in Jeju.
The London-born Korean shot three birdies against four bogeys to move alongside Yang Soo-jin at the top of the leaderboard on three under 141 heading into Sunday's final round.
Yang was one of the few to manage a below par score as she carded three birdies against two bogeys for a 71.
Overnight leader and defending champion Seo Hee-kyung dropped to one shot off the pace after a 74 and is in a share of third alongside Kim Bo-kyung, Kim Hyun-ji and amateur Han Eun-jeong on two under.
The highest ranked European at the tournament Becky Brewerton managed a second successive 73 and is tied 19th on two over 146 overall.