You can extend your France tourist visa while in France under certain exceptional circumstances, such as a medical emergency that prevents you from leaving the country. However, a standard France tourist visa cannot be extended, and overstaying in the country may result in deportation or a fine. If you wish to apply for a visa extension, you must do so before your current visit visa expires. The only cases in which you may be allowed a visa extension are serious illness or injury. These family-related reasons occurred while you were visiting France, or a force majeure situation.