の途中で

in the middle of; on the way

→ の
phrase Uncommon #16,469
in the middle of; on the way Used after a noun or verb in the て-form to mean during an activity or while on the way to somewhere. It can also introduce an interruption, as in お話の途中ですみません (Sorry to interrupt).
JA: 仕事の途中で昔の友達に会いました。
EN: I met an old friend on the way to work.

私達はピクニックの途中でにわか雨にあった

We got caught in a sudden shower during our picnic.

儀式の途中で抜け出すバチが当たる

If you leave in the middle of the ritual, you’ll be punished.

— きっと、うまくいく (2009)

ジョギングの途中でにわか雨になった

It started raining suddenly while I was out jogging.

ロバート電話の途中で急に止めた

Robert suddenly stopped in the middle of the phone call.

仕事の途中で休む

Take a break in the middle of work.

今朝登校の途中で外国人一団に会いました

This morning, I ran into a group of foreigners on my way to school.

の途中でを落としたに違いない

I must have dropped my keys somewhere along the way.

講義の途中で彼女は吐き気を催した

She felt nauseous in the middle of the lecture.

お話の途中ですみません

Sorry to interrupt.