What circumstance could USCIS consider when deciding my application for Advance Parole?

Emergency – Provide a Dr. Letter or other supporting documents regarding a medical emergency. The medical treatment may be for a relative abroad or it may be for you to obtain life-saving medical treatment that is not otherwise available to you in the United States.

Employment – Provide proof of the seminar (specific to your career/field), interviews, training, assignments, or work meetings abroad, that you must attend in order to perform your job duties.

Education – Provide evidence of a brief class or program you plan to study abroad. You could also request travel to perform academic research in your field of current study.