The tally, a 29 per cent increase from the 2011 total, was boosted by an 80 per cent rise in the 20-29 age bracket, the Samaritans of Singapore (SOS) said in a statement.
"Common problems presented by this group of people involved stressful life events, and interpersonal relationship issues," said SOS, which aims to prevent suicides by providing emotional support through private counselling and a 24-hour telephone hotline.
Christine Wong, executive director of SOS, said young people under stress "tend to hide their pain behind a facade, not knowing where, how or who they can approach for help".
"People around them may not be aware of their distress and are hence unable to provide the support needed," she said in the statement.
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Wong added that the community should play an important role in "de-stigmatising" suicide by encouraging those under stress to talk about their struggles and suicidal feelings.
Suicide cases have consistently hovered around two per cent of total deaths in Singapore, an affluent city-state of 5.3 million residents known for its pressure-laden school system.
Despite a virtually full employment rate, Singapore also has a highly competitive work environment.
Suicide is an offence in the compact island-state, and anyone who survives an attempt faces a jail term of up to a year, a fine or both.
The World Health Organisation last year said one million people commit suicide every year worldwide, accounting for more deaths than wars and murders put together.