Suitbert Bäumer (28 March 1845 – 12 August 1894) was a Benedictine monk and historian of the Breviary and a patrologist of the nineteenth century.
He studied at the universities of Bonn and Tübingen; in 1865 he entered the Benedictine Beuron Archabbey, then newly founded, and was ordained priest in 1869.
Bäumer was long the critical adviser of the printing house of Desclée, Lefebvre and associates at Tournai, for their editions of the Missal, Breviary, Ritual, Pontifical, and other liturgical works.
He contributed a number of essays to reviews, e.g. on the Stowe Missal (the oldest liturgical record of the Irish Church) in the Zeitschrift für katholische Theologie (1892), on the author of the "Micrologus" (an important medieval liturgical treatise) in "Neues Archiv" (1893), on the "Sacramentarium Gelasianum" in the "Historisches Jahrbuch" (1893).
In his history of the Roman Breviary, Geschichte des Breviers: Versuch einer quellenmässigen Darstellung der Entwicklung des altkirchlichen u. des römischen Officiums bis auf unsere Tage (Freiburg i. Breisgau, Herder: 1895; French tr., R. Biron, Paris: 1905) he condensed the labours of several generations of students of the Breviary and critical results of the modern school of historical liturgists.