Yes, it is possible for a Singapore tourist visa application to be rejected. Like any other country, Singapore has its own set of immigration policies and criteria for issuing visas. The Immigration and Checkpoints Authority (ICA) of Singapore carefully evaluates each visa application based on various factors, including the purpose of the visit, financial capability, and compliance with immigration regulations.

There are several reasons why a Singapore tourist visa application could be rejected, such as:

1. Incomplete or inaccurate documentation: If the required documents, such as passport, application form, photographs, or supporting documents, are missing or incorrect, it can lead to visa rejection.
2. Insufficient financial means: Singapore may require applicants to provide evidence of sufficient funds to cover their travel expenses during their stay. If the applicant fails to demonstrate financial capability, the visa application may be rejected.
3. Inadequate travel itinerary: A poorly planned or unclear travel itinerary may raise concerns during the visa evaluation process. It is essential to provide a detailed and credible itinerary that aligns with the purpose of the visit.
4. Previous visa violations: If the applicant has a history of visa violations or overstaying in Singapore or any other country, it may adversely affect the visa application.
5. Security concerns: If the applicant has a criminal record or is deemed a security risk, the visa application may be rejected.
6. Lack of strong ties to the home country: The visa officers may consider an applicant’s ties to their home country as an indication of their intention to return. If an applicant fails to demonstrate sufficient ties, such as stable employment, family, or property ownership, it may result in a visa rejection.

It’s important to carefully review the visa requirements, submit all necessary documents, and provide accurate information to maximize the chances of a successful visa application. If a Singapore tourist visa application is rejected, there is usually an opportunity to reapply or seek clarification from the relevant authorities.