The nature of science (NOS) represents a way of viewing the scientific method, encompassing various systematic stages and methodologies in acquiring knowledge and new discoveries. Thus, this study was conducted to identify the aspects of NOS in the Malaysian Science textbook. The analysis focuses on the Form 3 Science textbook, specifically from Chapter 6 to Chapter 10, covering topics such as 'Electricity and Magnetism,' 'Energy and Power,' 'Radioactivity,' 'Space Weather,' and 'Space Exploration.' The study used a document analysis method based on a rubric to assess NOS aspects. Findings were gathered by calculating the frequency of NOS aspects within each chapter. Based on the study's findings and discussion according to these NOS aspects, it was concluded that the textbook is suitable and aligned with the learning levels of Form 3 students. The results of the study show that, empirical, inferential, tentative, scientific theory and scientific law are the dominant aspects of NOS in Form 3 Science textbooks.