Searches for a weakly interacting particle candidate (WIMP) for dark matter at the Large hadron Collider complement the WIMP direct detection experiments and is one of the major physics goals of the LHC. A series of analyses in CMS (and ATLAS) are aimed at detecting events where a pair of WIMPs may have been produced and recoiled against a visible particle. Such events give rise to final states with large Missing ET and a high pT object, e.g. a jet, a photon, or a weakly interacting gauge boson.Searches for dark matter in final states with invisible particles recoiling against leptons and photons are presented in this talk. Various topologies are explored where several dark-matter production modes are covered. The talk focuses on the recent results obtained using the data collected during 2016 run of the LHC.