^{1}Department of mathematics, ILam Branch, Islamic Azad university, Ilam, Iran;

^{2}School of mathematics, College of Science, University of tehran, Tehran, Iran.

Abstract

Let L := U3(11). In this article, we classify groups with the same order and
degree pattern as an almost simple group related to L. In fact, we prove that L, L:2 and L:3
are OD-characterizable, and L:S3 is 5-fold OD-characterizable.