Q. 1. Is it appropriate for a Catholic to be praying the Rosary during the celebration of the Holy Mass?
A. 1. No, it is not appropriate to implement any kind of devotion during the celebration of the Holy Mass.
The Holy Sacrifice of the Mass is the greatest act of adoration, of thanksgiving, of petition, of worship and of reparation in the Catholic Church. It is the center of the Christian experience and identity. At no time during the celebration of the Holy Mass should a Catholic turn his attention away to other devotions. His obligation requires him to participate in the liturgy of the Holy Mass with the other members of the parish community.
Catholics are encouraged to implement their devotions outside the Holy Mass, either before or after.