According to updated court papers Mugabe had filled the bag with a million dollars and stashed it in the library of his country home in Zvimba, west of the capital, in 2016.
Only $78,000 was found in the bag on January 6 this year, according to The Herald citing court documents.
The three accused which include Constancia Mugabe, 50, a relative of the president appeared before Chinhoyi magistrates court on Thursday and were ordered to return on February 7.
Mugabe’s whereabouts have been unconfirmed since late November when President Emmerson Mnangagwa, his successor, said the ailing 94-year-old was in Singapore for medical treatment and was now unable to walk.
According to prosecutors Constancia Mugabe had keys to Mugabe’s rural house allowing the other suspects, who were employed as cleaners, to gain full access to the property when the theft occurred.
The court earlier this month heard that the three suspected thieves had stolen $150,000, but the updated court papers released on Thursday showed that he lost $922,000.
Robert Mugabe’s 37-year reign was marked by state corruption, economic collapse and brutal repression of dissent.