Can mortgage companysue us for walking away from a home we can no longer affordand cannot sell due to large balance?
No, you may NOT walk away rom the home without repercussions. The law, the promissory note, the mortgage, etc. do not care about your personal financial or employment situation. In financing your home, you contractually obligated  yourselves to repay the loan. If you stop paying it, the lender may foreclose; if the home, when sold (e.g. at a foreclosure auction) brings in less than is required to pay the remaining balance of the home, the lender may be able to sue you for the unpaid amount. You will also suffer a significant hit to your credit rating, from the default. Finally, note the lender does not have to take the home back or foreclose open it; it has the right to refuse to accept it, which means you will remain the owner and will be responsible for its upkeep, taxes, utilities, etc. If the lender does this, it will still be able to sue you for the money you owe under the loan.You write that the home is worth less than the balance; in the situation, there is no reason to assume that the lender will accept losing money and will not come after you, in some way or form.