foreclosure

I am currently in a Chapter 13 plan. I have a rental property that is in default right now. The rental property although originally listed in the Chapter 13 was granted relief from stay, so they are no longer in my Chapter 13 plan. (I only listed $300.00 in late fees to them originally). The property is currently vacant and I have not paid on it since May. The location of the property is terrible, the neighborhood atrocious and the properties are not moving at all. I have consulted with a reputable real estate agent who doesn't feel confident about moving the property. I contacted the mortgage company after they sent me correspondence leading me to believe they would accept a deed in lieu. They want me to list the house for sale. Although I understand they want to reap as much of their money back as possible, I just don't have the desire to go through this. I have owned the house for 25 years and cannot tell you the constant nightmares I have endured including the disastrous descent into bankruptcy thanks to this property! Without the attempt to sell, the mortgage company won't even talk with me. They were extremely nasty to me on the phone for over 27 minutes (17 of those on hold). I do understand the tax ramifications of a foreclosure, and my credit is pretty well shot for the next 10 years anyway. My question is if they sue for deficiency judgement won't it just go into the Chapter 13 pile?