SINGAPORE, July 18 -- Almost half of all civil divorces in Singapore last year were filed on the grounds of "unreasonable behaviour", while adultery accounted for fewer than one in 100 cases, according to newly released official figures that lawyers say reflect legal rules rather than the true causes of marital breakdown.

Statistics published by Singapore's Department of Statistics on July 10 showed that 48.7 per cent of civil, or non-Muslim, couples who divorced in 2025 cited unreasonable behaviour, making it the most commonly used legal basis for divorce, The Straits Times (ST) reported.

Adultery, by contrast, accounted for just 0.9 per cent of civil divorces - the lowest proportion of any legal fact cited.

The picture differs for Mu...