uninvolved

adjectives

not involved
"being uninvolved he remained objective"
antonym
is similar to
not occupied or engaged with
"readers unconcerned with style"
showing lack of emotional involvement
"adopted a degage pose on the arm of the easy chair"- J.S.Perelman; "she may be detached or even unfeeling but at least she's not hypocritically effusive"; "an uninvolved bystander"