Despite a fine show, Lahiri fell three short of the Australian Scott Hend, who won his third title of the season by a commanding three strokes.
Lahiri, starting the day four-under for 54 holes, cracked eight birdies, an eagle and dropped just one shot to have a shy at the title.
Hend, carrying an overnight four-shot lead over Ernie Els and Siddikur, never allowed anyone to get close.
The big-hitting Hend comfortably held off the chasing pack closing with a four-under-par 67 to for a 16-under-par 268 total to add to his triumphs in Chiangmai and Taipei this year.
Four-time Major champion, Els of South Africa shared third spot with Elmer Salvador of the Philippines after a 67 and 66, respectively in the USD 800,000 Asian Tour tournament.
Interestingly, the 26-year-old Lahiri tied countryman Amandeep Johl's course mark set in 2004.
Other Indians in the fray, Rahil Gangjee (72), lying fourth overnight, slipped to 11th at six-under 278, while Arjun Atwal (70) playing with Lahiri finished tied 13th at five-under 279.
Lahiri, who has three wins on the Asian Tour, got to within two shots of Hend during the final round but was still delighted with his strong finish.
