Mariana Vasileva-Toteva (Bulgarian: Мариана Василева Тотева, born 6 July 1974 in Bulgaria) is an Azerbaijani rhythmic gymnastics trainer of Bulgarian origin who is the former Deputy Minister of Youth and Sports of Azerbaijan (2021–2025) and former head coach of the Azerbaijan Rhythmic Gymnastics Federation.

In 2015, after the successful performance of the national team at the 1st European Games, she was awarded the Honorary Diploma of the President of Azerbaijan.

During the coaching period of Mariana Vasileva, the Azerbaijani national team managed to win prizes at the European Championships in 2009, 2011, 2013, 2014, 2018, 2020, 2022 and 2023.

An investigation found that she had beat gymnasts for gaining weight, required them to train when they were not healthy enough to do so, withheld money from athletes, and prevented them from contacting their families.

[8] Siyana Vasileva has competed for the Azerbaijani rhythmic gymnastics team and is the youngest naturalized athlete in the history of the country.