Exception
Exclusion
noun, verbal noun
Exclude this one and put it outside what we're considering. This is the exception.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
除外理由を教えてもらえませんか？
Could you tell me the reason for the exclusion?
その馬、鼻血で競争除外になっちゃったみたいだよ。
It seems like that horse was excluded from the race due to a nosebleed.
その場合はどうやら適用除外になってしまうみたいですね。
In that case, it seems it will be excluded.
ただし、除外規定があるみたいなので、気をつけてください。
However, there seems to be an exemption rule, so please be careful.