Randhawa shot a 4-under-par 68 for a total of five-under-par 139 at the 36-hole tournament at the Saujana Golf and Country Club in Malaysia.
Two Australians, former club professional Scott Barr and Kim Felton, also had 139. Japan's Yoshinobu Tsukada (140) clinched the final remaining spot after winning a four-way playoff.
The top four of more than 40 players in the event qualified for the Open, to be played at Royal Troon in Scotland, July 15-18.
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