The study was to determine roles of growth support programs on performance of micro and small enterprises with a focus of Anza Entrepreneurs Limited (Anza) in Tanzania. The research objectives were to find out the role of financial sector deepening program in enabling enterprises access financing and meet their financial needs to enable their performance; to establish the role of business development services program performance; and to determine the role of business sector program support on performance of micro and small enterprises. The study used descriptive design. Data collection was through use of questionnaire and interview guides. The target population involved the entrepreneurs (n=210) accessing services from Anza. The study used stratified probability sampling in the selection of respondents (Anza clients) who have obtained or have been accessing growth supporting programs. Descriptive statistics presented by frequency tables were used to analyze and present the data from questionnaires. In particular, the researcher used SPSS software package version 25.0 to generate frequency tables as means of presenting data. The findings of the study were that financial sector deepening program provided ability to access formal financial services, has enabled business access financing through grants or crowd funding, has enabled business be ready for financing in commercial way like through bank facility, it has provided low cost financing through lower interest rates and It has enabled the business roll out its strategic plan and meeting milestones with sufficient working capital.