Joint venture (JV) form has been adopted in construction industries worldwide because of the huge benefits, one of which is that foreign companies can share their work experiences and resources with local companies that understand cultural, political, and legal factors in their countries well. Even though JV is an attractive option for international construction business management, it is also extremely risky due to size, complexity, and multifaceted operations of JV projects. The objective of this study is to assess risk factors affecting three performance stages of international construction joint venture (ICJV) projects in Vietnam namely Startup, Operation, and Dismantle. Based on the findings through questionnaire surveys and in-depth interviews, critical risk factors were first identified and compared among three stages to appreciate their differences and similarities. Finally, the results of this paper were (a) the characteristics of risk factors in each stage, (b) startup stage of ICJV contained many potential risk factors should be most concerned, and (c) trend analysis in different stages of ICJV projects.