Although contracted for the full season, Haryanto's backing only stretched as far as the first half of the season, and despite the Indonesian government's best efforts, the funding, reportedly in the region of €7 million, could not be found.
"The Sports Ministry is disappointed with the decision, as Manor's racing director Dave Ryan in February promised Rio Haryanto would race a full season in F1. Moreover, Manor's team director Abdulla Boulsien in June said Rio is part of the team's long term plan for at least two years," ministry spokesman Gatot Dewa Broto said in a statement.
"We understand the situation in which Manor asked Rio and his management to pay the remaining fees before the Hungarian Grand Prix on July 24 and it turned out that Manor gave another chance for Rio to race until German Grand Prix. Sports Ministry appreciates that."
The statement also revealed that the Sports Ministry had tried to use state funding to keep Haryanto in F1 but was blocked.
"We asked to use state budget to finance Rio, but it wasn't allowed by the lawmakers. The parliament fully supports Rio's involvement in F1 but using the state budget is not the option," said Broto.
Mercedes-backed Ocon's deal to replace Haryanto is thought to include an agreement that will give the team a further discount on their Mercedes engines, similar to the agreement already in place with Pascal Wehrlein.
Bahrain International Circuit - Winter testing