In 2020, Joseph-Maurice Weder will perform again in various countries: Brazil, Germany, Armenia, Ukraine, Malta, Slovenia and Switzerland. As soloist, he will appear with the National Chambre Orchestra of Armenia, Dnipropetrovsk Philharmonic Orchestra, Orquestra Sinfônica do Teatro Nacional de Brasília and the Ensemble Caméléon Amsterdam (strings of the Concertgebouw Orchestra Amsterdam and Rotterdam Philharmonic Orchestra).