No, and its unlikely. I have one, I love it but its had two years worth of updates. It may get some extended security patches but I don't believe it will get marshmallow officially. It may get support via a 3rd party rout such as cyanogenmod.
I'm actually looking for a tablet and samsungs treatment of their tablet owners is the primary reason I am looking elsewhere. I cant believe people dropped upwards of $700 on the 12.2 inch note and many of them are stuck on kitkat.
Sorry to be the bearer of bad news :( I'm going to hang onto my note 3 for another year or two but unless they bring back removable batteries and sd card I'm probably getting an LG.