There is a paucity of research on racial/ethnic differences in preceding circumstances of suicide among adolescents aged 10-19years and consequential potential misclassification of suicide deaths (i.e., manner of death classified as injury of undetermined intent). This study (1) examined preceding circumstances of suicide among non-Hispanic White, non-Hispanic Black, non-Hispanic Asian/Pacific Islander (A/PI), non-Hispanic American Indian/Alaskan Native (AI/AN), and Hispanic adolescent decedents; and (2) investigated potential suicide misclassification of racial/ethnic minority decedents. We used data from the 2006-2015 National Violent Death Reporting System Restricted Access Database. Multivariable logistic regression analyses examined differences in depressed mood, mental health problem and treatment, crisis in the past 2weeks, problems with school, intimate partner, family relationship, and other relationships (e.g., friend) among racial/ethnic minority decedents compared to White decedents. A separate logistic regression analysis assessed potential suicide misclassification of racial/ethnic minority decedents relative to White counterparts. Adjusting for sex and suicide history and circumstances, all racial/ethnic minority decedents had significantly lower odds of documented mental health problem and treatment compared to White decedents. Racial/ethnic differences in relationship problems were also identified. Black decedents had significantly higher odds of manner-of-death classification as undetermined intent than did White decedents, suggesting greater likelihood of suicide misclassification. Circumstances contributing to suicide among adolescents differ by race/ethnicity, indicating the need for culturally tailored suicideprevention efforts.