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.
その馬はソエにより競争除外となりました。
The horse was excluded from the race due to shin soreness.