[5] In February 2020, Mayasari advanced to the finals of the Italian Junior International in both girls' and mixed doubles events, but the tournament was canceled due to the outbreak of COVID-19 in Italy.

[12] Mayasari and her partner, Ribka Sugiarto, started the BWF tour in the home tournament, Indonesia Masters, but lost in the second round from Indian pair Tanisha Crasto and Ashwini Ponnappa.

[15] In March, Mayasari and Sugiarto competed in the European tour at the Swiss Open but lost in the first round from fellow Indonesian pair Febriana Dwipuji Kusuma and Amalia Cahaya Pratiwi.

[17] In April, Mayasari and Sugiarto competed at the Orléans Masters in France, but had to lose in the semi-finals from Chinese youngster pair Liu Shengshu and Tan Ning.

[18] In late April, they competed at the Asian Championships in Dubai, United Arab Emirates, but had to lose in the first round from Indian pair Treesa Jolly and Gayatri Gopichand.

[22] In June, Mayasari and Sugiarto competed at the Singapore Open, but lost in the first round from fellow Indonesian pair Febriana Dwipuji Kusuma and Amalia Cahaya Pratiwi.