Tom McKibbin is the next-best Irish player on seven-under-par, sitting tied fourth after a 68, while Liam Nolan is two-under.
Shane Lowry is in pole position to claim a second Irish Open title after opening up a four-shot lead heading into the final round at Doonbeg.
The Offaly golfer produced a superb third-round 65, with six birdies and just one bogey, as a red-hot putter helped him pull clear of the chasing pack.
Lowry, who famously won the tournament as an amateur in 2009, will now have the opportunity to add a first Irish Open victory as a professional on Sunday.
Tom McKibbin is the next-best Irish player on seven-under-par, sitting tied fourth after a 68, while Liam Nolan is two-under.
Rory McIlroy endured another difficult day, carding a 74 to fall back to two-over-par and 50th place.
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