Sony and Amazon are the latest major companies to pull out of one of the world's largest tech shows because of risks posed by coronavirus.
Sony said it would no longer take part in Mobile World Congress in Barcelona after "monitoring the evolving situation" after the coronavirus outbreak.
The organiser has said the event, which attracts 100,000 people, will go ahead.
But it admitted other companies are considering whether to attend.
South Korea's LG Electronics, Ericsson, the Swedish telecoms equipment-maker, and US chip company NVIDIA have all withdrawn from the conference, which runs between 24 and 27 February.
