The present disclosure relates to 3-substituted 1,2,4-oxadiazole compounds and their derivatives, which are useful as T-cell immunoglobulin and mucin-domain containing-3 (TIM-3) inhibitors or as dual inhibitors of TIM-3 and the programmed cell death 1 (PD-1) signaling pathway. The disclosure also relates to treatment of disorders by inhibiting an immunosuppressive signal induced by TIM-3, PD-1, PD-Ll, and/or PD- L2.