Chikka, who was second after the first round and then seventh after the second, carded even par 70 to emerge as the best Indian at T-18th. Rashid Khan (73), on the other hand, slipped to T-39th.
However, Rahil Gangjee (66) made a big move to T-23rd.
Among other Indians, Gaganjeet Bhullar (68) was T-39th and Chiragh Kumar (70) was T-58th and Viraj Madappa (71) lied at T-64th.
Gangjee, who had the best card among all the Indians, fired five birdies against one bogey.
Home favourite Panuphol Pittayarat birdied the last two holes for a four-under-par 66 to pull one shot clear.
Thailand's Poom Saksansin trailed closely in second place after matching Panuphol's 66 while overnight leader Sarit Suwannarut posted a 69 to lie in third place, two shots from the lead at the USD 300,000 Asian Tour event.
The 25-year-old Panuphol, who won his first Asian Tour title last year, was neck-to-neck with Poom before he seized the outright lead by holing a 10-foot birdie putt on the 18th hole.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)