Searches for Supersymmetry at the high luminosity LHC with the ATLAS Detector

Supersymmetry is arguably one of the most motivated and well-studied extensions of the Standard Model. The current searches at the LHC have yielded sensitivity to TeV scale 1$^{st}$, 2$^{nd}$ generation squarks and gluinos, as well as to 2$^{rd}$ generation squarks and weak gauginos in the hundreds of GeV mass range. The reach at the high-luminosity phase of the LHC is expected to significantly extend beyond the current limits. Selected searches based on 3000~ifb and performed with the ATLAS detector are presented in this document.