Aspects of the disclosure relate to compositions, kits, and methods for the treatment of cancer that utilize a selective histone deacetylase 3 (HDAC3) inhibitor. In some aspects, the compositions, kits, and methods relate to use of a selective HDAC3 inhibitor in combination with an immunotherapy agent (e.g., an immune checkpoint inhibitor).本發明之態樣係關於使用選擇性組蛋白去乙醯酶3 (HDAC3)抑制劑治療癌症的組合物、套組及方法。在一些態樣中,該等組合物、套組及方法係關於選擇性HDAC3抑制劑與免疫治療劑(例如免疫檢查點抑制劑)之組合使用。