Increasingly, immigration policies are understood as structural determinants, rooted in racism, nativism, and ethnocentrism, which raise serious public health concerns for Latinx adolescents' mental health. Our objective was to examine how immigration policy enforcement affects mental health of Latinx youth raised in a county with an aggressive interior immigration enforcement program. From 2009 to 2021, Gwinnett County, GA, led the nation in deportations under the 287(g) program as a "universal enforcement model," where local law enforcement were deputized to detain undocumented immigrants, primarily through traffic violations. From June to July 2022, we followed a participatory action research approach with two groups of Latinx youth who grew up in Gwinnett County. In total, 10 youth took photos related to the research question, and engaged in facilitated dialogue using photovoice guide SHOWED/VENCER for four, 2-hour sessions that were audio-recorded and transcribed. Transcripts were analyzed following grounded theory principles to arrive at a conceptual model codeveloped and validated by youth. Youth described how 287(g) led to policing and deportation in their communities, fueling stereotypes, and discrimination that criminalized Latinx immigrants. Youth linked immigration enforcement policies like 287(g) to exclusionary systems that contributed to fear, marginalization, and loss in their communities, bringing experiences of sadness, grief, isolation, hopelessness, and low self-worth. From youth-driven research, we identified mental health implications of the 287(g) program among Latinx youth. The cascading harms of immigration enforcement policies highlight the need to address these policies and identify immediate strategies to promote Latinx youth mental health.