ICE’s Intensive Supervision Appearance Program offers alternatives to detention. We reviewed whether: (1) the rate at which individuals in the Intensive Supervision Appearance Program have absconded or committed criminal acts has been reduced since 2009; (2) ICE can improve the effectiveness of its alternatives to detention program, either by revising or expanding its Intensive Supervision Appearance Program contract, or through other cost-effective means; and (3) ICE’s Risk Classification Assessment is effective. According to U.S. Immigration and Customs Enforcement (ICE), the Intensive Supervision Appearance Program is effective because, using its performance metrics, few program participants abscond. However, ICE has changed how it uses the program and no longer supervises some participants throughout their immigration proceedings. As a result, ICE cannot definitively determine whether the Intensive Supervision Appearance Program has reduced the rate at which aliens, who were once in the program but who are no longer participating, have absconded or been arrested for criminal acts. ICE should adjust its performance metrics to reflect changes in its criteria for program participation.