なるべくなら

expression

if possible; preferably

Used to express a preference or a condition that one hopes will be met. Often softens a request or suggestion.

• なるべくなら、明日あしたまでに返へん事じをください。

  If possible, please reply by tomorrow.

• なるべくなら、静しずかな場ば所しょで話はなしたい。

  I'd prefer to talk in a quiet place, if possible.