Allison,
Do you mean you can't find the marriage? You have the year though? That's a pity. Do you have children's baptisms? The marriage may have taken place at the same church.
As you can see we ask for the information to try to get a better picture of what is being asked.
This is done in good faith and with the intention of helping. As has been pointed out other records can give clues.
I may be wrong but it seems as though you have searched for Mary Kelly, found the one from Leitrim in 1902 and accepted that one without definite confirmation.
It does help people who are searching for you, if you give as much information as possible at the outset. This not only helps to identify the right person but also avoids unnecessary duplication and presentation of information already known by yourself which has resulted in your reply #38.
Heywood