The foreign ministry said South Korean participation in the Strait of Hormuz would be regarded as support for US "aggression" and would have serious consequences.

South Korea said on Sept. 4 it was weighing “contributions” to U.S. security efforts in the strategic Strait of Hormuz, potentially including a military deployment, but noted that…

Seoul heavily affected by closure of strategic waterway and under heavy US pressure for participation against Iran.

Seoul says military deployment an option but ‘nothing decided’ yet