The Third Convention was a dissident group of Mexican Latter-day Saints (Mormons) who broke away from the main body of church authority in 1936 over a dispute about local governance and autonomy of The Church of Jesus Christ of Latter-day Saints in Mexico. A contributing cause of the dissension may have been the Cristero War of 1926-1929, a counter-revolutionary movement against certain anti-clerical provisions of the 1917 Mexican Constitution. These provisions had expelled foreign clergy from Mexico, resulting in isolation of Mexican Mormons from their church's headquarters in Salt Lake City, Utah.[1]
As a result, a group of Mexican Mormons led by Abel Páez, first counselor of the Mexican district presidency, demanded that church leadership appoint a Mexican mission president "of pure race and blood" (de pura raza y sangre). After three rebuffs, a breakaway faction of the Mexican mission district organized what came to be known as the Third Convention, separate from and without authority from church leadership in the United States. These "Third Conventionists" (as they were known) conducted missionary activity in some small mountain villages in central Mexico.[2]
Several members of the Third Convention were temporarily excommunicated by the LDS Church during the period in which it was active, although most of these were changed to the lesser punishment of disfellowshipment by President George Albert Smith in 1946, signaling a compromise. Rapprochement continued with President Smith's visit to Mexico that year, resulting in most Third Conventionists returning to the fellowship of the LDS Church.[1]