A Schengen visa, including one issued for Belgium, can be extended under specific circumstances, but only if the visa is still valid and the holder has not exceeded the 90-day limit within the Schengen area. Extensions are rare and granted only in exceptional situations where the request is supported by valid reasons. Below are some of the scenarios where a Schengen visa extension may be approved:

1. Medical Emergencies

If you encounter a medical emergency that makes it unsafe or impossible for you to travel, you may qualify for a visa extension. This applies in situations where your health condition prevents you from leaving Belgium.

2. Humanitarian Grounds

In cases where a significant personal situation arises, such as a family emergency, your visa may be extended. An example could include the need to stay with a relative due to serious illness or another urgent matter requiring your presence.

3. Force Majeure

Unexpected events that are beyond your control, such as natural disasters, severe weather conditions, or political unrest in your home country, can also justify an extension. If returning to your country becomes dangerous or unfeasible due to these circumstances, you may be granted more time in Belgium.

4. Compelling Personal Reasons

In some instances, personal reasons that are not covered under the above categories may still qualify for an extension. Each case is reviewed individually, and the reasons must be deemed sufficiently important by the authorities.

While it is possible to extend a Schengen visa in Belgium, the criteria are strict, and only compelling reasons will be considered. Always ensure that your visa remains valid and that you adhere to the 90-day rule to maintain eligibility for an extension.