; and (B) by striking subparagraph (C); (3) by redesignating paragraph (3) as paragraph (4); and (4) by inserting after paragraph (2) the following: (3) Return to foreign territory contiguous to the United States (A) In general The Secretary of Homeland Security may return to a foreign territory contiguous to the United States any alien arriving on land from that territory (whether or not at a designated port of entry) pending a proceeding under section 240 or review of a determination under subsection (b)(1)(B)(iii)(III). (B) Mandatory return If at any time the Secretary of Homeland Security cannot— (i) comply with its obligations to detain an alien as required under clauses (ii) and (iii)(IV) of subsection (b)(1)(B) and subsection (b)(2)(A); or (ii) remove an alien to a country described in section 208(a)(2)(A), the Secretary of Homeland Security shall, without exception, including pursuant to parole under section 212(d)(5) and parole or release pursuant to section 236(a), return to a foreign territory contiguous to the United States any alien arriving on land from that territory (whether or not at a designated port of entry) pending a proceeding under section 240 or review of a determination under subsection (b)(1)(B)(iii)(III). .