Singapore made it to the final of the four-team tournament with wins over Philippines (25-4), Thailand (10-6), and Indonesia (8-6).
Singapore had finished fourth in the five-team group with a 1-3 win-loss record and that meant they had to play Malaysia (2-2) who finished third.
Singapore will play their final game against Botswana on Dec 19, which would determine whether Singapore manages a podium finish in the Netball Nations Cup 2015.
In the 400m final, Zac Leow finished in seventh place with a timing of 70.60 seconds while Michelle Yogasweri Krishnamoorthy clocked a timing of 70.67 seconds.
ASEAN Para Games Cerebral Palsy Football: Singapore beat Malaysia 4–2 with strong second half effort
Both teams will meet again in the bronze medal playoff, which will be played on Wednesday, December 12, at 12pm.
Dr William Tan came in seventh place with a timing of 18.77 seconds in the Men's 100m race.
Singapore lost 3-13 to Indonesia during their second game. With this loss, Singapore holds a 0-2 win-loss record.
Officially opened by Dr Tony Tan Keng Yam, President, Republic of Singapore, 6,000 people gathered to celebrate the mental and physical strengths of people of all abilities at the opening ceremony of the 8th ASEAN Para Games.