What do you do with students who miss Conformation prep class more than 1/3 of the time?
Sorry "Confirmation"...dislike spell check
I would approach the parent, see if anything is wrong and if nothing is, then I might give them "homework" to make up for missed class time so they at least get the content. If there are further issues I would consult the pastor.
We have a policy where students are allowed to miss 3 classes without penalty. Then after that they are required to do some pretty hefty makeup work. Usually they strive to be there because it isn't as bad as the makeup work.