omis·sion

/oʊˈmıʃən/ noun, pl -sions

1 [count] : something that has not been included or done : something that has been omitted

There are a few omissions in the list/book.

2 [noncount]

2 a : the act of not including or doing something

— often + of

I believe that the omission of my name was intentional.

2 b : the state of being not included in something

— often + from

I am surprised by her omission from the team.