COP3
# COP3

COP3 or COP 3 may refer to:

* 1997 United Nations Climate Change conference, the third session of the Conference of Parties to the UNFCCC (COP 3) in Kyoto, Japan, where the Kyoto Protocol was adopted
* Alpha-muurolene synthase, an enzyme
* Gamma-muurolene synthase, an enzyme
* Lake Rosseau/Onnalinda Point Water Aerodrome, the Transport Canada LID for the aerodrome in Ontario
