Will you be forced to sell deceased mother's house in Maryland left to and where family members are living to cover mothers credit card debt?

Yes, the house will probably have to be sold to pay off the credit card debt if there are no other assets. The alternative might be for those that live there and are to inherit to take out a mortgage and buy the house from the estate for the amount of the credit card debt and pay off the credit card bills. This would eliminate the credit card companies placing a lien on the house and allow them to get clear title.