In Saturday's third round, Dredge, who won the Omega European Masters last month, was able to shoot 1-under-par 71 to maintain the lead he grabbed in the second round the day before.
"I struggled a bit (but) I take some confidence from my victory in Switzerland and I'm looking forward to tomorrow," said Dredge, who, with an overall score of 13-under 202, leads second place Padraig Harrington of Ireland (68) by the one-shot.
Harrington's total is 12-under 203.
"I played well early on and hit it superb for 11 holes," Harrington said. "I still have a chance."
American Edward Loar is alone in third place at 9-under 206.