困った時は

when you're in trouble

→ 困る
phrase Rare #29,340
when you're in trouble Used to introduce what to do or what happens when someone has a problem or needs help. 時 can also be written とき.
JA: 困った時は、いつでも私に連絡してください。
EN: When you're in trouble, contact me anytime.

彼は困った時はいつも助けを求める

He always asks his older sister for help when he’s in trouble.

英語で困った時は手伝うよ

I'll help you when you're having trouble with English.

— オッペンハイマー (2023)

困った時はお手紙ください

Please write to me if you run into any trouble.

私は困った時はいつでも彼に相談する

Whenever I have a problem, I ask him for advice.