Eun-Hee Ji will head into the final round of the JTBC Founders Cup with a one-shot lead after a late stumble from Sei Young Kim.
Kim headed into Saturday's running with a two-shot lead, and she remained out in front heading to the 16th tee. However, back-to-back bogeys saw her drop to 17-under, one behind Ji.
Ji was propelled to the front on the back of a seven-under round of 75 as she goes in search of her first win of the year.
Kim had enjoyed the running in Phoenix on the opening two days, firing a tournament-record 15-under 129 after 54 holes. However, the South Korean found the going tougher on Saturday and could only card a round of two-under.
Lewis had a 64 to thank for her share of second spot, with the American joining Kim one off the pace.
World number on Lydia Ko charged up the leaderboard and into a share of fourth after a blemish-free 64. The New Zealander moved to 15-under where she is joined by Carlota Ciganda.
The US President was among the viewers watching the TaylorMade Driving Relief.
The US President phoned in as McIlroy played in a Sunday fundraiser for coronavirus victims.
Syme donated his prize money to charity.
‘This is the life of a caddie…’
The Northern Irishman is ranked number one in the world.
Players entering the United States will face a 14-day quarantine period, while a strict testing regime will be in place at each tournament.
The experienced duo will be involved at Whistling Straits.
The world number 98 intends to split the 10,000 euros prize money between his own charity and a hospital in his native Rotterdam.
The biennial event between Europe and the United States is scheduled to take place from September 25-27.