Carl Traeholt says there should be no reason for any further loss of biodiversity given Malaysia's financial capability and advanced technological development.
The rhino had been shot in the leg and neck before his 2008 capture but the pellets are unlikely to have contributed to his ill health.
Only Iman, a female Sumatran rhino, remains in Sabah after Tam, believed to be in his mid-30s, dies.
Jamal Khashoggi, a contributor to the Washington Post, has not been seen since he went to the Saudi mission on Tuesday to receive an official document for his marriage.
State Minister Masidi Manjun believes Sabah’s rhino population can be saved with the use of scientific initiatives.
The Sumatran Rhino Sanctuary in Indonesia has been reported to be willing to send sperm to Malaysia later this year for conservation breeding to keep the species alive.