ままにして

leave ... as it is

→ 侭
phrase Uncommon #9,682
leave ... as it is Used after a description of a state to mean keeping something in that state.
JA: 電気をつけたままにしておいてください。
EN: Please leave the light on.

人を待たせたままにしておくべきではない。

You shouldn't keep people waiting.

私と一緒に来てくれないかポニョも一緒に…ポニョは寝たままにしてそっと行こう

Will you come with me? Bring Ponyo along too... Let's let her sleep and leave quietly.

— 崖の上のポニョ (2008)