Shortly before the October 2019 Synod of Bishops on the Amazon, which was expected to hear some bishops advocate for the ordination of married men to the priesthood, Ouellet published a book expressing his skepticism, Friends of the Bridegroom: For a Renewed Vision of Priestly Celibacy. He noted that rural communities of the region struggled to provide training even for catechists. During the synod he said that "Celibacy has an incomparable evangelizing power". He called for a "vocational culture" that would engage both laity and religious.
