H3 (also H3, as-Sabiyah) is an archaeological site in the Subiya Region (Kuwait) that was occupied during the second half of the sixth millennium BC. It was a cultural borderland between Neolithic Arabia and Mesopotamia. Among the finds at the site were a boat model and pieces of bitumen covered with reed impressions that may have come from an actual boat, making this among the earliest evidence of a sea-going vessel in the world.