the moment that they were legitimately baptized, they were Catholic....you cannot be baptized anything else.....after you are baptized you may choose to fall away and practice some other denominational teaching, but you are then just a non practicing Catholic....no other way it is possible....Baptism makes you a Catholic.....
terycarl:
They are baptized yes, so they are related to the Church via Baptism. They have never been received the sacrament of Confirmation or First Communion, so no they have never been in full communion with the Catholic Church. They are in partial communion via baptism yes, full communion, no.