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.

[1] Finds at the site include small pieces of bitumen believed to have been used to waterproof boats, providing some of the earliest direct evidence for sea faring.

Originally, the site may have been located on the edge of a shallow lagoon, but today it is surrounded by mud flats.

[3][4][5] Based on the pottery, H3 has been dated to the Ubaid 2-3 period, or second half of the sixth millennium BC.

This area was probably used for the production of stone and flint tools.The second structure consisted of four rooms with corbelled walls, possibly to support a roof.

[3] Based on these substantial architectural remains, it has been suggested that the inhabitants may have lived for extended periods at the site - if not permanently.

This pottery has been dated to Ubaid 2-3, with parallels found at sites like Choga Mami in Mesopotamia and Dosariyah along the Gulf coast.

The second consists of a ceramic disc made from a sherd that appears to depict a reed bundle boat with two masts.