American Lilia Vu still holds the lead at the Ford Championship in Arizona, two shots clear of England's Charlie Hull, with Leona Maguire failing to make up ground on those ahead of her after a 71.
Vu posted a 68 to finish on 18-under-par in a round that included a double bogey at the 14th before she bounced back with three successive birdies to grab pole position going into Sunday's final round.
Maguire bogeyed three of her last five holes in what was an up and down round that also saw her make six birdies. She is currently tied for 58th on five under.
Hull (-16), who opened with a 63, posted the same score. She started with a bogey, but birdied the second and added five more as she completed a third round in the 60s.
Denmark's Nanna Koerstz Madsen and Ayaka Furue of Japan are a shot further back with Yahui Zhang among a group on 14-under-par, which also includes Thailand's world number two Jeeno Thitikul, after a seven-under-par round of 65.
Defending champion Nelly Korda, who started the day in a tie for second with Hull, Madsen and Thitikul, bogeyed two of her last three holes en route to a disappointing 73 and is five strokes off the lead.
Additional reporting PA
