Extension of the Standard Model (SM) by gauged SU(3) symmetry of families involves new physics at high energy scales. Even elusive from direct experimental probes, such construction can be tested in the combination of Particle physics, Astrophysics and Cosmological signatures. We point out possible Cosmological impact of the new scalars, gauge bosons and vector-like quarks and leptons, including sterile neutrinos, of the vector-like SU(3) family symmetry.