You will be required to apply for a Visa if you hold a travel document issued by one of the following countries listed at https://www.ica.gov.sg/enter-depart/entry_requirements/visa_requirements. You can apply for an entry visa at the abovementioned link.
If you do not have a Singpass/Corppass account, you may submit the visa application through an authorised visa agent appointed by the Singapore Overseas Missions or at the nearest Singapore Overseas Mission.
You may visit the Ministry of Foreign Affairs' website under "Singapore Missions Worldwide" for locations of the Singapore overseas missions. Visitors are advised to liaise with the nearest Singapore Overseas Mission direct for detailed procedure if the visa application is to be submitted at the mission or through their authorised visa agents.
You will require a visa to travel to and seek entry into Singapore if you hold a travel document issued by one of the countries or places as listed.
If you are unable to find your country/places and the passport types in the list, please forward a clear scanned copy of the passport\travel document's front cover and particulars page (i.e. showing holder's full name, nationality, passport number and its date of issue/expiry) to ICA for assessment.