St. John Chaldean Catholic Church is the third Chaldean parish in San Diego, CA, serving the Eparchy of St. Peter the Apostle for the Chaldeans. The dedication of the church and blessing of the altar was in December, 2017, and the first Mass celebrated in this church was the Christmas Eve Mass, 2017. The eparchy purchased the building from a non-Catholic Christian denomination, and the first renovations began immediately. The eparchy also purchased a small house next door as an administration building, the land next to the church for parking, and a larger house, also connected with the rest of the property, for the monastery, where the monks who serve the parish reside.

The Chaldean Church is a Patriarchal Church, with its homeland in ancient Mesopotamia and modern-day Iraq. It is one of the twenty-three Eastern Catholic Churches within the whole Catholic Church. It dates to apostolic times, with St. Thomas the Apostle evangelizing the inhabitants of Mesopotamia, before moving onto India, where he was martyred.

The language of the Chaldean Church is Aramaic (Chaldean, which is neo-Aramaic), with a eucharistic prayer which is the oldest in the Catholic Church.