Well, technically, no. A person who is excommunicated must first have the canonical penalty of excommunication lifted before he can receive absolution in confession.
While in excommunication, that person is separated from the Church ergo separated from the body of Christ. If that person does not partake in confession, then essentially the Church has damned the person to Hell right?
No. If a person has separated himself from the Church and refuses to return, then he has made a decision for himself.
But isn’t Christ the only one that can make the determination of whether salvation is lost?
Yes; and through His ministry and His revelation in the Bible, He’s let us know a bit about that determination. It has to do with the choice of either following Him or giving in to sin. It’s some of these sins that are the reasons for excommunication. What it comes down to is that excommunications don’t result from the Church making up rules on its own, but from the Church applying the standards of behavior that Jesus taught.
I can understand a person puts their salvation in jeopardy by being excommunicated, but I’m not sure if it goes all the way to damnation if the person does not make confession.
If a person sins, and then does not repent, how would you describe it, then?
I think I need more clarification on part 2.
Sure; although there are already lots of threads around here on “extra ecclesiam nulla salus.” Notice what it says (and what it doesn’t say!) It’s not “a person who is outside the Church cannot be saved”; rather, it’s just that salvation proceeds from Christ and His Church. No other means of salvation exists; anyone who is saved… is saved by Christ through the graces of the Church He founded.
Do you have a particular question about it?