場合は

Means in the case that or when a certain situation happens.

N4conditionalformal

Examples

住所が変わった場合は、この用紙も出してください。

じゅうしょが かわった ばあいは、この ようしも だしてください。

If your address has changed, please submit this form too.

本人確認ができない場合は、口座を作れません。

ほんにん かくにんが できない ばあいは、こうざを つくれません。

If identity cannot be confirmed, you cannot open an account.

Meaning

場合は means "in the case that..." or "when..." and sounds practical or official.

Usage

Place a sentence, verb phrase, adjective phrase, or noun phrase before 場合は.

PatternMeaning
Verb plain + 場合はin the case that someone does
Verb past + 場合はin the case that something happened
Noun + の場合はin the case of noun

Notes

This is common in offices, banks, clinics, and other situations where staff explain rules.