In his email, Kalanick did not specify how long he would be away from the company, but cited the need to take time off to grieve the loss of his mother, who died in a recent boating accident.
Kalanick has developed a reputation as an abrasive leader, and his approach has rubbed off on his company. The 40-year-old executive was captured on video in February berating an Uber driver.
Qatari banks have around 60 billion riyals ($16 billion) in funding in the form of customer and interbank deposits from other Gulf states, Chiradeep Ghosh, banking analyst at SICO Bahrain, said.
The US chipmaker's new offer, to be presented by Thursday when the struggling Japanese conglomerate is to decide a preferred bidder for its Toshiba Memory Co unit.
Yahoo shareholders on Thursday approved the company's sale, according to preliminary results from a shareholder meeting, and it is expected to be completed on Tuesday.
Bahrain, Saudi Arabia, Egypt, the UAE and several other countries severed diplomatic and transport ties with Doha on Monday, accusing it of supporting Islamist militants and their arch-foe Iran.
The British capital's FTSE 100 index turned flat heading into midday, wiping out initial gains, while the pound edged lower against the dollar with voting underway.
Qatar Airways was forced to reroute dozen of flights through Iranian airspace as the world's second-richest nation per capita found itself almost boxed in by no-fly restrictions.
The move follows a string of executive departures at Uber, including the company president, heads of finance and product, an East Coast general manager and several high-level engineers.
