The study focused on the most critical issues like work overload and the fear of negative evaluation, and here we measured the impact of work overload and the fear of negative evaluation in addition resultantly occur the role of frustration on employees' performance in Commercial Banks of Islamabad, Pakistan. An online and by hand floated questionnaires were distributed to the employees to obtain feedback. The target population for this study were Banks' managerial and administrative employees. Based on the convenience sampling design, 240 employees from 35 banks were approached. 199 completely filled questionnaires were received out of 240 employees. The collected data was analyzed using Smart Partial Least Squares (PLS) Path Modelling Method and Statistical Package for Social Sciences (SPSS) version 22 for analysis and the reliability test, for all items of each scale and satisfactory results were obtained. Results show that work overloads negatively influence employee performance. Similarly, fear of negative evaluation also creates an adverse impact on performance.