The Indian failed to cash in on the close sixth game win as he ended with the junior boys silver medal on Sunday evening.
The No. 3 seeded Indian went down to top-seed Kanak Jha of the US 3-4 (11-9, 3-11, 11-9. 6-11, 3-11, 11-9, 6-11) in the see-saw final that saw the pendulum swing from one extreme to another.
Credit must go to the American youngster who did not qualify for the main draw but made it there through games ratio after finishing first in initial group stage.
In the semifinals, Thakkar accounted for Egypts Youssef Abdel-Aziz, who had beaten Jha in group stages, in straight games of 11-8, 11-8, 115, 11-8.
In the other match, the US paddler defeated sixth-seed Russian Ivonin Denis 11-3, 12-10, 11-9, 11-6.