3rd Congress

3rd Congress may refer to:
 * 3rd Congress of the Philippines (1954–1957)
 * 3rd Congress of the Russian Social Democratic Labour Party (1905)
 * 3rd Congress of the Workers' Party of Korea (1956)
 * 3rd National Congress of the Chinese Communist Party (1923)
 * 3rd National Congress of the Kuomintang (1929)
 * 3rd National Congress of the Lao People's Revolutionary Party (1982)
 * 3rd National People's Congress (1964–1975)
 * 3rd United States Congress (1793–1795)
 * 3rd World Congress of the Comintern (1921)
 * Brussels Congress (1868), the 3rd Congress of the First International
 * International Socialist Workers Congress, Zürich 1893, the 3rd Congress of the Second International