Blyth had an eagle, six birdies and two bogeys in the third round and has a three-round total of 14-under 202, a shot ahead of Chinas Liang Wenchong (67) and Swedens Alexander Noren (69) in the jointly sanctioned Asian Tour and European Tour event. Blyth is seeking his first professional win.
American Anthony Kang raced up the leaderboard with a 64 and is a stroke further back at 12 under. Joining him on that mark, and in similarly impressive fashion, were Englands Miles Tunnicliff (63) and Thailands Prayad Marksaeng (65).
With 18 players within six strokes of Blyth, the $2 million event remains wide open going to the final round at the Saujana Golf and Country Club.
The worlds No. 11-ranked player, Anthony Kim, shot a 71, but the American effectively put himself out of the competition with a 78 on the opening day before a 65 on Friday that enabled him to make the cut.
Second-round leader Danny Chia shot a 74 but remains only three shots off Blyth.