Recent results from searches for beyond standard model particles decaying to quarks of the third generation with data collected by the CMS experiment are presented. For all searches proton-proton collision data at a center-of-mass-energy of 13 TeV with an integrated luminosity of 137 fb$^{-1}$ are analyzed. In addition, the state-of-the-art techniques in the identification of boosted objects and pileup mitigation which are used in the analyses are discussed. The searches can be grouped in three different categories: excited bottom quarks, heavy gauge boson and vector-like quarks.