Deportation is only an issue if your spouse is a non-Singaporean. If your spouse holds an Employment Pass, then their status will remain unchanged after a divorce and thus continue to stay in Singapore. However, if your spouse is on a Dependant’s pass, depending on your status for their stay in Singapore, then they’ll have to leave the country within 14 days after the divorce. That is, unless, your spouse can get a job and convert to an Employee Pass.