The 19-year-old's three-round total read at an impressive 8-under 208 at the testing 7227-yard course.
Trishul's citymate Udayan Mane caught fire on his back nine making two birdies and an eagle in the first three holes to return a card of 2-under 70 for an overall total of 212.
Ainesh Ahluwalia was lying third at level par 216. Ankur Chadha, Vikram Rana and Aman Raj were tied for the fourth spot at 217. Another local lad Jaibir Singh matched the day's best of 67 to move up to the seventh spot at 218 along with Hemendra Choudhary.
Meanwhile, Udayan dropped a shot and when the duo took the turn, Trishul was leading by six which was reduced to three by the 12th.
It was not because Trishul's mistakes as he did good to make a birdie on the 11th but because of Udayan's heroics which read birdie-eagle-birdie.