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Note added at 46 mins (2023-02-17 11:16:39 GMT)
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a carer is someone who looks after an ill or old person or children. And, in Farsi mostly we use "پرستار" for it.

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Note added at 50 mins (2023-02-17 11:20:46 GMT)
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a carer is someone who looks after an ill or old person or children. And, in Farsi mostly we use "پرستار" for it.


https://www.google.com/amp/s/www.khabaronline.ir/amp/450833/

این حادثه تلخ که غم و ماتم به جان همه پرستاران زحمتکش شیرخوارگاه آمنه انداخته است، روز شنبه 24 مردادماه رخ داد.

این نوزاد تحت نگهداری پرستاران شیرخوارگاه آمنه بود تا اینکه روز شنبه 24 مردادماه پسر چهار ساله‌ای دور از چشم پرستاران بازی خشنی کرد و همه را به شوک انداخت.

To the best of my knowledge, there is no 'foster care' program in its western sense in Iran (see the provided link). People can care for another person's child in their home only permanently through adoption and if the court decides so after a long procedure. You might like to explain the expression in a footnote, emphasizing the social and cultural differences.