H.R.3993 - Federal Government - To provide for a prohibition on discrimination in employment against certain family members caring for recovering members of the Armed Forces.

Military Family Job Protection Act - Prohibits a covered family member who is caring for a servicemember who is undergoing medical treatment for an injury, illness, or disease incurred or aggravated while on active military duty from being denied retention in employment, promotion, or any employment benefit by an employer on the basis of the family member's absence from such employment for a period of not more than 52 weeks.

Includes as a covered family member one who, while caring for the recovering servicemember, is: (1) on invitational orders; (2) a non-medical attendee; or (3) receiving per diem payments from the Department of Defense (DOD).