3rd Saeima was the parliament of Latvia from November 6, 1928 until November 2, 1931. Social Democrat Pauls Kalniņš continued to hold the post of Speaker of the Saeima to which he was first elected during the 1st Saeima.
3rd Saeima gave confidence to the 2nd cabinet of Hugo Celmiņš (December 1, 1928 – March 26, 1931), and the 3rd cabinet of Kārlis Ulmanis (March 27, 1931 – December 5, 1931).
3rd Saeima elections were held on October 6-7, 1928 and 79,35% of eligible voters participated. Due to the liberal Elections law, 27 parties and candidates lists were elected to the 100 seats, representing all the political and ethnic interest groups of Latvia.