Sublevel B3 is a sub-level of the Garage within the Smith Residence. It is used by Rick to store and imprison people and aliens that he wants to get rid of but not kill them. They are stored within sacs of globaflyn where they are trapped to live in their simulated dreams that show what they want the most forever. One of the aliens, Tony, was kept in a sac until he rejected his simulation and Rick decided to free him from the room. It was seen again when Rick and Morty enter the room to chase after Morty's lightsaber which cuts through a globaflyn sac.
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