If your green card application is denied, your ability to stay in the U.S. depends on your current immigration status. If you were in a valid nonimmigrant status (like an H-1B or F-1 visa) when you applied and that status remains valid, you can typically stay in the U.S. until that status expires. However, if you were relying solely on the green card application to remain in the U.S., you may have to depart the country or face removal proceedings.