Overnight joint leader Jodi Ewart Shadoff shot a nightmare round of 77 to fall down the leaderboard and out of contention for the title at the Women's Australian Open in Adelaide.

The 32-year-old, who finished top of the leaderboard on -10 alongside South Korea's Inbee Park after day two, suffered a lapse in form shooting a four-over par round and slipping to six under.

She now sits at joint 22nd while seven-time major winner Park, 31, surged ahead with a round of 68 putting her 15 under, three shots ahead of compatriot Ayean Cho.

Stephanie Meadow from Northern Ireland heads into the final day of competition tied for 14th place on seven under.