The 3rd Parliament of Upper Canada was opened 28 May 1801. Elections in Upper Canada had been held in July 1800. All sessions were held at Parliament Buildings of Upper Canada in York, Upper Canada. This parliament was dissolved 14 May 1804.
This House of Assembly of the 3rd Parliament of Upper Canada had four sessions 28 May 1801 to 9 March 1804:
References
3rd Parliament of Upper Canada Wikipedia(Text) CC BY-SA