 This led to the discovery in 2017 of a third, non-transiting planet, designated HD 3167 d.

The close-orbiting body HD 3167 b has a mass of and radius .It most likely has had its atmosphere stripped away by the host star, leaving a rocky planet with about 15% iron by mass.HD 3167 b is orbiting HD 3167 with a period of , an orbital inclination of 83.4°, and an assumed orbital eccentricity of zero – a circular orbit.