What is the Sharia ruling on how to deal with parents who feel discontent and have disowned their daughter despite her kindness and dutifulness towards them, and who fabricate flimsy excuses to cut ties?

You have done well by honoring your parents and being keen on showing them kindness; for their status is great and their right is significant. May Allah reward your husband for his kindness to his in-laws, as this is part of living together honorably.

Be patient with the harm and aversion from your parents, and avoid mistreating them so that you do not fall into disobedience.

Pray to Allah to rectify their situation and what is between you and them, and seek help from wise individuals among your siblings or others to reconcile between you.

Continue to be kind to them and try to maintain ties with them, even if they sever them. If there is no fault on your part, then no sin will befall you, nor will you be considered a severer of ties of kinship, and their mistreatment will not harm you.