Both players had enter their maiden final of a PSA event.
Singh went down to Dimitri Steinmann of Switzerland 5-11, 1-11, 5-11 in 29 minutes.
Kuruvilla was beaten 7-11, 6-11, 3-11 in 24 minutes by Tamika Saxby of Australia.
Singh had upset top-seed Rhys Dowling of Australia in the semifinals, winning from two games to down.
Kuruvilla had beaten second-seed Lisa Camilleri of Australia in the semifinals.