This is the 3rd edition of ‘A Guide to Assessment in Veterinary Medical Education’. The current edition continues the aims of the original version and uses a similar format as well as embracing the increased interest in assessment within the veterinary education community and the many relevant developments in medical and veterinary education in the interim. The guide begins with an overview of the principles of assessment, challenges and terminology including reference to Miller’s pyramid and Bloom’s taxonomy. The next section ‘Assessment Methods’ contains short summaries of a range of methods commonly used in veterinary and medical assessment. As in the previous editions (2008, 2014), the subsections ‘ascend’ Miller’s pyramid from ‘Knows’ and ‘Knows How’ to ‘Shows’ and finally ‘Does’. The final section ‘Additional Key concepts and Recent Developments’ has been expanded and provides an overview of key concepts in addition to new sections reflecting the research and developments in assessment since the last edition was published.