uninvolved
Not taking part in an activity, situation, or problem.
Uninvolved means not taking part in something or choosing to stay separate from an activity or situation. When you're uninvolved in an argument between two friends, you're not picking sides or joining the disagreement. You're staying out of it.
Someone might stay uninvolved in a school project by not contributing ideas or doing their share of the work, though this usually frustrates the rest of the team. A teacher might remain uninvolved in a minor playground dispute, letting students work it out themselves. Parents who are uninvolved in their children's lives don't participate much in what their kids are doing or learning.
The word often describes a deliberate choice to keep your distance. You might stay uninvolved in drama between classmates because you don't want to make things worse. A country might remain uninvolved in a conflict between other nations, choosing neutrality instead of taking sides.
Being uninvolved isn't always negative. Sometimes staying uninvolved shows wisdom, like when you recognize that a situation doesn't concern you or that your participation wouldn't help. But being uninvolved when people need you or when you have a responsibility to participate is usually a problem worth noticing.