A four-over par round of 75 saw Shane Lowry's challenge at the Honda Classic come to an end while Matt Jones will begin the final round with a three-shot lead.
Lowry began five shots off leader Aaron Wise at Palm Beach Gardens and a birdie on the ninth saw him move up the standings, but things unravelled on the back nine.
Successive bogeys at 11 and 12 were followed by three further bogeys, including the par-5 18th and will begin his final round 10 shots adrift of Jones.
The Australian stayed steady in changing weather conditions at Palm Beach and is at 10-under heading into the final round at PGA National after a one-under 69.
"I need to just keep doing what I'm doing," Jones said after the round on Golf Network. "Hopefully just keep giving myself birdie putts and if I don't make them, just leave it close. On these greens, you don't want any of those comebackers. I've missed a few of those. Just manage the golf course and take what it gives me."
Wise fell out of the lead and into a tie for second place with JB Holmes at seven-under. He had a commanding six-shot lead early in Saturday's round but closed with four bogeys on the back nine, including three on his final four holes.
Both Jones and Wise took advantage of prior weather conditions. Wise shot a six-under 64 in each of the opening two rounds but came nowhere near that Saturday. Jones tied the course record with a nine-under 61 to move just off Wise's pace.
Cameron Tringale, Sam Ryder and Chinese Taipei's CT Pan were tied for fourth place at six-under. A group of six tied for seventh place at five-under included Zach Johnson, Stewart Cink and defending champion Sungjae Im of South Korea.