As per a divorce law firm, there are multiple legal requirements for a divorce. These include being a Singaporean citizen or a permanent resident in Singapore for at least three years. One also has to be married for at least three years to file for a divorce unless you obtain permission, otherwise from the court.
Moreover, the applicant will also need to provide reasons for divorce to the court. The acceptable reasons include adultery, separation, and unreasonable behavior.
Furthermore, you will also have to plan ancillary matters like child support and care, spouse's maintenance, assets distribution, etc. As the process is complicated, it is highly recommended to involve a divorce law firm.