  RZ Psc is a young Sun-like star with a bright and warm infrared excess that
is occasionally dimmed significantly by circumstellar dust structures. Optical
depth arguments suggest that the dimming events do not probe a typical sight
line through the circumstellar dust, and are instead caused by structures that
appear above an optically thick mid-plane. This system may therefore be similar
to systems where an outer disk is shadowed by material closer to the star. Here
we report the discovery that RZ Psc hosts a 0.12$M_\odot$ companion at a
projected separation of 23au. We conclude that the disk must orbit the primary
star. While we do not detect orbital motion, comparison of the angle of linear
polarization of the primary with the companion's on-sky position angle provides
circumstantial evidence that the companion and disc may not share the same
orbital plane. Whether the companion severely disrupts the disc, truncates it,
or has little effect at all, will require further observations of both the
companion and disc.
