Many theories beyond the Standard Model predict new phenomena, such as $Z’$, $W’$ bosons or heavy neutrinos, in final states with isolated high-$p_{\rm T}$ leptons $e/\mu/\nu$. Searches for new physics with such signatures, produced either resonantly or non-resonantly, are performed using the ATLAS experiment at the LHC. The recent 13 TeV $pp$ results will be reported.