India were cruising along at 171 for 2 chasing a stiff target of 353 on a placid track but the middle-order crumbled in chase with Maxwell (4/40) getting crucial breakthroughs to restrict the hosts to 286 in 49.4 overs
While the Indians pumped in as many as eight goals in the first two quarters, the Singaporeans did show some resistance after the halfway break as they conceded just five goals
Though India fought back at the end after being taken for plenty of runs, Labuschagne batted through others collapsing around him to make 72 off 58 balls.
Grandmasters Gujrathi and Arjun Erigaisi finished fifth and sixth respectively while former bronze medallist D Harika took fourth place and 2006 champion Koneru Humpy ended seventh
In an Instagram post, she wrote, "The race ends here. As an athlete, you anticipate this day, when your career becomes a snapshot of memories and, hopefully, medals."