As a form of non-verbal communication, fashion entails several elements, such as clothing, accessories, hairstyles, and makeup, and conveys several implicit messages. The communication of messages in this manner is referred to as fashion diplomacy. With the development and expansion of digital media and the possibility of overcoming space and time limitations, fashion diplomacy can surpass traditional verbal communication tools in terms of its impact on both general and specific audiences, encompassing both public and private diplomacy. This study focuses on the implications of adherence or non-adherence to the diplomatic dress code by foreign officials during their meetings with Iranian officials between 2010 and 2019. The fashion's role in message communication is analyzed using the theoretical perspectives of Michael R. Solomon and Roland Barthes on fashion encoding and decoding. A qualitative descriptive-analytical approach is adopted to examine the dress code of foreign officials during diplomatic meetings with Iranian officials. The study involves analyzing qualitative data, specifically photos, and decoding the dressing choices portrayed in the media. The resulting analysis sheds light on the semiotics of fashion in these diplomatic visits. A thorough analysis of the theoretical and practical implications of fashion's role in message communication has led this study to a notable conclusion. During the aforementioned period of diplomatic meetings between Iranian and foreign officials, implicit messages were conveyed through fashion choices. The messages under scrutiny can be classified into four discrete forms: backing off, pretending/hypocrisy, insult/disrespect, and respect/intimacy.