I feel apologetic for you.
I am regretful about the little one. I know how difficult such a situation can be. I urge you, accept my heartfelt condolences.
I feel apologetic about the little one. I know what difficult such a situation might seem. I kindly request, receive my heartfelt regrets. I genuinely feel remorseful the inconvenience inflicted. I am anticipating that your child will forgive me.