ないんだよ

there isn't; don't have …

→ 無い
phrase Common #2,411
there isn't; don't have … Adds an explanatory, emphatic tone to a negative statement. The exact English translation depends on what is being negated.
JA: 今日は時間がないんだよ。
EN: I don't have time today, you know.

なんで冷蔵庫の中に食べ物がないんだよ。

Why is there no food in the fridge?

銀行にあんまりお金ないんだよな。

I don't really have much money in the bank.

食べてる時間ないんだよ。

I don't have time to eat.

スーツケースが置いた場所にないんだよ。

My suitcase isn’t where I left it.

金のなる木はないんだよ。

There’s no such thing as a money tree.

食べてる余裕ないんだよ。

I don't have time to eat.

最近は仕事がなかなかないんだよ。

I haven't been able to find much work lately.