Emergency Community Supervision Act This bill establishes measures to reduce the number of individuals in federal custody during a national emergency relating to a communicable disease. Specifically, it does the following: requires certain categories of inmates to be released and placed in community supervision (e.g., home confinement); limits the use of pretrial detention; and modifies supervised release, including to suspend the request for detention and imprisonment as a sanction for a violation of probation, supervised release, or parole.