Kaev Hua III or Chey Chettha V (Khmer: បរម រាមាធិបតី) (1674–1731), born Ang Em, was a Cambodian king in the early 18th century (r. 1700–1701, 1710–1722, 1729–1730).
Chey Chettha IV married a daughter to Ang Em; this was a political marriage.
A Vietnamese army under Trần Thượng Xuyên and Nguyễn Cửu Phú (阮久富) was sent to Cambodia to help Ang Em.
Thommo Reachea III and Chey Chettha IV were defeated and fled to Ayutthaya Kingdom.
In 1729, he resumed the government and was crowned as supreme king xith the title of Chey Chettha V. He reigned for six months and then abdicated a second time in favour of his eldest son, Satha II (1730).