済んだら

when ... is finished, once ... is over

→ 済む
済ん be finished, be completed + だら conditional ‘if/when’ ending
verb · conditional Rare #25,667
when ... is finished, once ... is over
JA: 仕事が済んだら、帰りましょう。
EN: Once the work is finished, let's go home.
Conjugation of 済む

済んだら戻してください

Please put it back when you're done.

済んだら熱いお風呂に入る

Once I'm done, I'll take a hot bath.

— ウエスタン (1968)

馬車の支度済んだら出発

We'll set off as soon as the carriage is ready.

— 荒野の用心棒 (1964)

あなたが済んだらその新聞を僕に読ませて下さい

When you're done, please let me read that newspaper.

済んだら電気消すのよ

When you're done, turn off the lights.

全部済んだら金を受け取って消えるそれが約束

Once it's all done, you'll take the money and disappear. That's the deal.

— ANORA アノーラ (2024)

済んだら教えてね

Let me know when you're done.

計画を実行済んだら別々に戻る

We'll carry out the plan, then go back separately once it's done.

— ワンス・アポン・ア・タイム・イン・ハリウッド (2019)