Being excluded from discussion or information; kept out of the loop. Literally 'outside the mosquito net.'
プロジェクトの重要な会議に呼ばれず、私は蚊帳の外に置かれていると感じた。
I wasn't invited to the important project meeting and felt like I was being kept out of the loop.
彼女は決定プロセスから意図的に蚊帳の外にされた。
She was deliberately left out of the decision-making process.
小さな変更についてはチーム全員に伝えたが、一部のメンバーはまだ蚊帳の外だ。
I informed the whole team about the minor changes, but some members are still out of the loop.