In most states, it is not legal to keep a wild rabbit as a pet. Even if a baby rabbit is orphaned, it is better off in the hands of a licensed wildlife rehabilitator, notes House Rabbit Connection.
Most baby rabbits found without their mother are not orphans. If the nest appears undisturbed and the babies seem healthy, it is best to cross the nest with two or three strands of thin string and come back after 24 hours. If the mother rabbit returns, the string gets displaced. If the mother does not return or an injured baby rabbit is alone, contact a licensed wildlife rehabilitator and follow her instructions.