Parry is at 13-under 203 and will face competition for the $804,000 prize money over the final 18 holes at St. Andrews on Sunday from PGA champion Martin Kaymer (68) and Alvaro Quiros of Spain (68). Both share second place. All three played at Carnoustie.
Parry said his self-belief is boosted from winning the Vivendi Cup in Paris two weeks ago for his first European Tour victory.
“I take a lot of confidence from my win in France and will go into the final round with the same mindset as I had there,” he said. “I was a little nervous then, but then sometimes nerves can help. They make you concentrate that little bit more.”
The Englishman dropped a shot at the last after laying up and failing to hole a 15-foot putt.
I would have taken level par around Carnoustie today,” he said. “It’s a tough course and it was windy, so 1 under is obviously a good score. But fair play to some of the others shooting 4 and 5 under.
“My mindset was to try and get as far ahead of the field as I could, but I didn’t quite have the pace of the greens and it was just a grind out there.”
Lee Westwood shot a 66 to rise to fifth place. The Englishman will take over Tiger Woods’ No. 1 ranking if he wins or finishes second.
Battling an ankle injury, Westwood said he won’t play at the Portugal Masters next week no matter where he finishes Sunday.
“I haven’t set myself any targets about when I will return to golf, but after I finish here I am taking a break to get the ankle right,” he said.