Objective: To estimate prevalence of depression, anxiety, stress and its association with socio-demographic characteristics among patients, waiting prior to elective coronary angiography. Methodology: This cross-sectional analytical study was conducted in National Institute of Cardiovascular Diseases (NICVD). A total of 349 adult patients, waiting for elective angiography were part of this study. DASS-21(Depression, Anxiety, Stress scale-21) was used to assess depression, anxiety and stress among study participants. Data were by using SPSS version 21.0. Chi-square test was performed to estimate the association of demographics characteristics with stress, anxiety and depression. Conclusion: This study concludes that depression and anxiety were significantly associated with educational level and monthly income. Furthermore, stress level was significantly associated with only educational level of the study participants.