Future Physics prospects with the CMS Detector at the High-Luminosity LHC

The High-Luminosity Large Hadron Collider (HL--LHC) is expected to deliver an integrated luminosity of up to 3000 fb$^{-1}$. The very high instantaneous luminosity will lead to about 200 proton-proton collisions per bunch crossing, pileup, superimposed to each event of interest, thus providing extremely challenging experimental conditions. Prospects for selected measurements with the Compact Muon Solenoid (CMS) experiment in the Standard Model (SM) and Higgs sectors as well as prospects for searches for new physics Beyond the Standard Model (BSM) are presented.