S.C. Code Ann. § 14-7-860
(B) A person who:
(3) is the primary caretaker of a severely disabled person who is unable to care for himself or cannot be left unattended; and desires to be excused from jury duty must submit an affidavit to the clerk of court.
The affidavit must state that he is unable to provide adequate care for the child, person aged sixty-five or older, or disabled person while performing jury duty, and must be excused by the presiding judge from jury service.