Diabetes is the furthermost widespread illness in Saudi Arabia consuming huge health and financial inferences. If not controlled, diabetes can cause serious complications which can impair or end the patient life. Hence, to stop and regulate the sickness, every effort should be made. Diabetes cosequences are less common when people are more knowledgeable and aware of the disease and its consequences. We aimed to asses the awareness level of the diabetes mellitus complications among diabetic patients in Saudi Arabia. We searched PubMed, Web of Science, Science Direct, EBSCO, and the Cochrane library. Utilizing Rayyan QCRI, study papers were already screened by title and abstract before a full-text analysis was done. More than half of respondents in this article's eight research, which comprised individuals of both sexes and different ages, were men. In all included studies we included diabetic patients in Saudi Arabia and we evaluated their awareness level about diabetic complications. The general level of awareness of Saudi diabetic patients was relatively good, and the highest awareness levels were obtained in the educated individuals. Likewise, to quantify greater people's awareness level, hospital-based practitioners could step up their efforts to educate diabetic patients and family members on the significance of managing their diabetes and preventing its consequences.