The 25-year-old, who opened the tournament with an impressive six-under-66, was unable to maintain that early momentum and finished her third round without a birdie.
Kildare's Lauren Walsh has dropped down the leaderboard heading into the final round of the LPGA's Portland Classic after carding a two-over-par 74 on Saturday.
The 25-year-old, who opened the tournament with an impressive six-under-66, was unable to maintain that early momentum and finished her third round without a birdie.
Bogeys on the 10th and third holes left her at three-under-par overall.
Walsh now sits tied for 60th heading into Sunday's final round, 13 shots off the lead.
Despite the difficult third round, the Kildare golfer remains in position to finish her week on a positive note after making the cut and showing her potential with a standout opening round.

1.6Million People Tuned Into Final Round Of Katie Taylor's Retirement Fight
Moment's Silence To Mark Nepal Flood Victims At This Weeks Champions League Matches
Tyson Fury "Looking For New Opponent" Despite Contracted Fight With Anthony Joshua
The Fourth Round Continues At The US Open Today
Monday Morning Sports Update
Full Weekend SFC/IFC/JFC Results & Quarter Final Draws for IFC & JFC
Newbridge Town Beaten By Villa FC In Historic National League Home Opener
Zverev Cruises Through As Fritz Crashes Out Of US Open