Chelsea have confirmed to Sky Sports News that forward Willian is in Brazil with his family during the coronavirus outbreak.
The club has allowed him to return to his wife and children after granting the player a leave of absence on appeal following a request to return home on compassionate grounds.
The 30-year-old has spent seven years at Stamford Bridge and faces an uncertain future with his contract due to run out at the end of June.
The Premier League season has been suspended until at least April 30, while Chelsea's players have joined the nation in a three-week lockdown.
Chelsea's policy is to treat each case individually if one of their foreign players ask to repatriate.