Sheik Farhan outclassed Vietnam's Mach Quoc Hung 5-0 in the men's Class J (90-95kg) final, while Shakir Juanda recovered from an early setback to win the Class I (85-90kg) final.
Almost two years ago at the last world championships in Phuket, Suhaila was a kick away from beating Selly for the gold medal in the women's Class D (60-65kg) final.
A second-half collapse meant the Lions fell 2-1 to Indonesia in their final Group A match at the Rizal Memorial Stadium in Manila.
For 89 minutes, Singapore hardly gave their Thai opponents a sniff of goal.
The Lions will be pleased with the point, after playing with only 10 men for almost an hour, when Hafiz Sujad was dismissed in the 34th minute for a high boot on Phil Younghusband near the halfway line.