Sandhu (65-71-68) fired a four-under 68 while Muniyappa (68-67-69) returned a three-under 69 in round three as both held the joint lead with identical totals of 12-under 204. Delhi's Ashok Kumar (68-67-70) was one shot off the lead in third place.
Sandhu, who had shot a 65 in round one to take the lead, thereafter slipped to tied third in round two after a score of 71. However, the 27-year-old worked his way back to the top of the leaderboard with a gritty 68 in round three. His only blemish in the third round was the opening bogey thanks to a missed chip-putt.
Muniyappa, who finished as the joint round two leader earlier in the day after a score of 67, held on to his position in round three courtesy a 69 that saw him convert from 10 feet on three occasions.
Muniyappa, a former Indian Open champion, began hitting the right notes in the second round when he made two birdie chip-ins in quick succession on the first and fourth. He had holed the first of the two, from the bunker.
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Ashok, like Muniyappa, had also carded a 67 in round two and thus shared the halfway lead with the latter. However, a 70 in round three meant, Ashok slipped two spots to third place at 11-under 205.
Gurgaon's Manu Gandas produced the best score of round three, a six-under-66, to end the day in tied fourth at 10-under-206 along with Noida's Vikrant Chopra (70), who led the field when play was suspended due to fading light yesterday.
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