STERIS Irish FinCo Unlimited S-3ASRAutomatic shelf registration

Exhibit 23.3

Consent of Independent Auditor

We consent to the incorporation by reference in this Registration Statement on Form S-3 and related prospectus of STERIS plc of our reports dated March 8, 2019 and March 5, 2018, relating to the consolidated financial statements of Dental Holding, LLC and Subsidiaries, appearing in Amendment No. 1 to Form 8-K filed by Cantel Medical Corp. on December 16, 2019. We also consent to the reference of our firm under the heading “Experts” in such Registration Statement.

/s/ RSM US LLP

Schaumburg, Illinois

March 23, 2021