The coronavirus disease 2019 (COVID-19) pandemic has caused distressing experience among nurses worldwide. However, the prevalence of anxiety symptoms and how anxiety influence clinical performance and quality of work life (QWL) among nurses in this unrestricted emergency are unknown. Aim: This studywas designedto assess the level of anxiety among nurses previously infected with COVID-19 and its relation to their work performance and QWL. Methods: A descriptive correlational study was conducted at the compound of university hospitals and Ministry of Health hospitals. The sample consisted of 190 nurses. Four tools were used to collect data, namely, socio-demographic data, Clinical Nurse Performance Questionnaire, QWL Questionnaire, and Hamilton Anxiety Scale. Results: A statistically significant correlation (0.001**) was observed between clinical nurse performance, QWL, and anxiety. The nurses under study had severe symptoms of anxiety and general physiological symptoms; however, they had a moderate level of performance. Conclusion: Anxiety among the nurses in this study positively affected their performance and QWL. Recommendations: More studies on nurses infected with COVID-19 are needed.