Philip Jonas came in alone in second at 3-under-par 213. Craig Taylor was one shot further back at 2-under-par 214.
'I haven't been in this position in a while so I'm not sure how I will react Sunday,' said Jonas. 'This course isn't set up for the wind, so it makes it tough. Usually I don't have too much trouble putting, but I tell you with that wind it is tough to get comfortable over the putter. If I can stay relaxed Sunday, I should be all right.'
Sutterfield shot a 69 on Friday before play was suspended due to darkness at the Fazio Foothills Course at Barton Creek Resort. After the second round was concluded Saturday morning, Sutterfield got right back to work.
The 35-year-old faltered early with a bogey at the opening hole, but he was able to recover with a birdie at the very next hole.
Sutterfield added a birdie at the eighth to reach 6 under before finding trouble with a bogey at the 10th. He parred his way in, but managed to maintain the outright lead as his competitors struggled.
'It was tough to see on that final hole and I was just trying to get the right speed,' said Sutterfield. 'Your depth perception is off in times like that. On a day like today, I figured if I could shoot even par I would still be in the hunt. Mario (Tiziani) had a rough time coming in, and it's always hard to stay in a groove when your playing partners are struggling.'
Tiziani, who was one shot off the lead after 36 holes, carded a third-round 75 to join Kris Mikkelsen and Ben Bunny in a tie for fourth at 1-under-par 215.
Derek Gillespie, Steve Scott, Jason Schultz and Dan Swanson finished in a tie for seventh at even-par 216.
Erik Compton, Nick Davey, Marcus Jones and Ryan Miller were one shot further back in a tie for 11th at 1-over-par 217.