Brent Schwarzrock posted a 2-under 70 in the third round to move to 7-under-par 209. He is one of three players to card three straight rounds under par. Deane Pappas also shot 71 to take third place at 5-under-par 211.
Bowditch got off to a rough start with a bogey at the first. He bounced back with an eagle at the second to move to 11 under. The young Australian stumbled to back-to-back bogeys from the third to fall to minus-9.
The 21-year-old bogeyed six and seven at Royal Adelaide Golf Club to fall further back to the field. However, Bowditch dropped in a birdie putt at the eighth to get one stroke back. He picked up another birdie on No. 9 to make the turn at minus-9.
'I was pretty nervous and I couldn't work myself into a good rhythm and my focus was way out of whack for the first four or five holes,' said Bowditch of his tough start.
Bowditch birdied the par-4 11th for the third straight round. He faltered to another bogey at the 13th. The Australian then birdied the par-5 15th for the third day in a row to get back to minus-10. He parred out to remain three strokes clear of the field.
'You can obviously tell a bloke by the golf shots I was hitting, they were very loose golf shots, I haven't hit those for a couple of weeks now,' Bowditch said. 'I think I got into a really good rhythm after six or seven and got back into my own game and playing within myself again.'
Schwarzrock got off to a fast start with birdies at one and two to get to 7 under. He stumbled to a bogey at the fifth, but atoned for that mistake with a birdie on the par-4 eighth.
The 32-year-old tripped to another bogey at the 12th, but quickly got that stroke back with a birdie on No. 13. Schwarzrock picked up another birdie on the 15th, but stumbled to a bogey at the next. He parred his final two holes to take second place.
'I just noticed it switching, one hole in particular, 13, it changed three times before it was my turn to hit so it was hard to figure out some holes,' said Schwarzrock of the windy conditions. 'There's certainly a few birdie holes out there, not many of them, but there are few out there.'
Greg Kraft shot a 1-under 71 Saturday to move to 4-under-par 212. He was joined there by five Australians - Greg Chalmers (73), Martin Doyle (70), Wayne Grady (68), Nathan Green (71) and Craig Jones (71).
Ryan Armour, Chris Tidland, Michael Wright and Brandt Snedeker are one stroke further back at 3-under-par 213.