Nursing shortage is a global issue that which affects oncology nursing. Oncology nurses are more prone to experience job dissatisfaction, stress and burnout when they work in units with poor staffing. There is thus a need for greater understanding of the relationship between the nursing shortage and nursing outcomes in oncology/haematology settings. This review aimed to establish the best available evidence concerning the relationship between the nursing shortage and nurses' job satisfaction, stress and burnout levels in oncology/haematology settings; and to make recommendations for practice and future research. Types of participants: This review considered studies that included oncology registered nurses (RNs) who were more than 18 years of age and worked in either inpatient or outpatient oncology/haematology wards or units for the adult or paediatric patients.Types of intervention: This review considered studies that evaluated the relationship between the nursing shortage and nurses' job satisfaction, stress and burnout levels in oncology/haematology settings.Types of outcomes: This review included studies that measured job satisfaction, stress and burnout levels using different outcomes measures. Job satisfaction was determined by the Measure of Job Satisfaction scale, the Misener Nurse Practitioner Job Satisfaction Scale and the Likert scale, stress by the Pediatric Oncology Nurse Stressor Questionnaire and burnout by the Maslash Burnout Inventory scale.Types of studies: This review included descriptive/descriptive-correlational studies which were published in English. The search strategy sought to identify published and unpublished studies conducted between 1990 and 2010. Using a three-step search strategy, the following databases were accessed: CINAHL, Medline, Scopus, ScienceDirect, PsycInfo, PsycArticles, Web of Science, The Cochrane Library, Proquest and Mednar. Two independent reviewers assessed each paper for methodological validity prior to inclusion in the review using standardised critical appraisal instruments from the Joanna Briggs Institute-Meta Analysis of Statistics Assessment and Review Instrument (JBI-MAStARI). Disagreements were resolved through discussion, or with a third reviewer. Data were extracted using standardised data extraction tool adapted from the JBI-MAStARI. Data synthesisDue to the heterogeneous nature of the included papers, a meta-analysis was not possible. Hence, a narrative summary was presented for the studies. This review encompassed seven descriptive/descriptive-correlational studies. Findings revealed a positive bidirectional relationship between the nursing shortage and oncology nurses' job dissatisfaction, stress and burnout. In addition, the extent of oncology nurses' job dissatisfaction, stress and burnout, and their perception of staffing inadequacy also differed according to nurses' demography and work settings. The nursing shortage, coupled with an increasing number of patients diagnosed with cancer, entail a pressing need for organisations to ensure sufficient staffing in oncology/haematology settings, in order to provide quality patient care. This then requires interventions that target both the recruitment and retention of nurses. Organisations need to customise their strategies for the recruitment and retention of oncology nurses. The strategies should take into considerations the specific demographic characteristics of oncology nurses or characteristics of work settings that are experiencing staffing inadequacy and negative nursing outcomes. The strategies should also aim to replicate features of other institutions that are attractive to oncology nurses; and also include training that help oncology nurses better manage their emotions. Future research need to examine the relationship between the nursing shortage and oncology nurses' job satisfaction, stress and burnout in bone marrow transplant units, paediatric oncology settings and also Asian oncology settings. Characteristics of oncology nurses or workplaces that are more likely to experience negative nursing outcomes due the nursing shortage should also be identified.