Edwin Ong Koon Chwee is believed to have taken his own life by leaping from the fourth floor of his barracks.
He was found dead at the bottom of the block at about 3am today.
Ong was part of the Charlie company 139th batch, and had just enlisted 3 days ago.
He left a final note on his Facebook page, apologising for being a “useless son” and asking the public to help his mother.
Ong added that he was “weak”, and that even though he might “burn in hell” he didn’t want to live in this “weird world” any longer.
Ong’s death comes about 6 months after another SCDF national service recruit, Shek Salmin, took his life.
He was overwhelmed by family problems, and this was aggravated by punishment meted out by his SCDF supervising officer.
The SCDF came under strong criticism from the public over that incident.