On 28 September 2021, fully vaccinated Masing tested positive for
COVID-19 and was admitted to the intensive care unit (ICU) of
Sarawak General Hospital (SGH). He was later transferred to Normah Sarawak Medical Centre (NSMC) in Petra Jaya after his condition deteriorated from Stage 3 to Stage 5, where he succumbed to various complications at 7.05 a.m., on 31 October at the age of 72. Further COVID-19 screening test result conducted on his body reported that he died of post-COVID heart conditions. His remains were brought to his residence at Jalan Ong Tiang Swee for
state funeral, service and wake arrangement according to the
COVID-19 pandemic standard operating procedure (SOP). On 3 November, the remains were transferred to the Association of Churches in Sarawak (ACS), Jalan Stampin as a ceremony held at Christian Ecumenical Worship Centre for the public to pay their last respects to the late politician. Among the dignitaries present were Chief Minister
Abang Abdul Rahman Zohari Abang Openg and his deputy
Douglas Uggah Embas. Masing's remains and coffin was later taken to the Nirvana Memorial Park in Siniawan, Kuching-Bau Road for the
last rites whereas a short Christian funeral service in Iban was held before burial and being laid to rest. == Election results ==