“…The recent work due to Tang et al [18,20] on third order differential subordination attracted to many researchers in this field. For example see [4,8,9,14,18,19,20,13,11]. In the present paper we considered suitable classes of admissible functions associated with Srivastava-Attiya operator and obtained sufficient conditions on the normalized analytic function f such that Sandwich-type subordination of the following form holds:…”