3rd Congress

3rd Congress may refer to:
 * Brussels Congress (1868), the 3rd Congress of the First International
 * 3rd Congress of the Philippines
 * 3rd Congress of the Russian Social Democratic Labour Party
 * 3rd United States Congress
 * 3rd National Congress of the Communist Party of China
 * 3rd National Congress of the Communist Party of Vietnam
 * 3rd Congress of the Lao People's Revolutionary Party
 * 3rd Congress of the Communist Party of Cuba
 * 3rd Congress of the Workers' Party of Korea
 * Zürich Socialist and Labour Congress, 1893, the 3rd Congress of the Second International