Emailed queries to the company did not elicit any response.
According to posts on various social media platforms, users complained they were unable to send or receive messages for about 30 minutes this afternoon.
India is home to over 200 million WhatsApp users. The Facebook-owned messaging platform has more than one billion users globally.
In August this year, there was a similar outage with services being affected in different parts of the world.
Users turned to platforms like Facebook and Twitter to vent out their frustration at not being able to use the service with '#WhatsAppDown' beginning to trend.
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Another trending tweet was "WhatsApp msg not sent: Step 1: Restart Mobile Data Step 2: Restart phone Step 3: Check #Twitter #WhatsAppDown trending".
A number of memes brought out the creative side of users. A netizen shared a gif of cartoon character, Homer Simpson carrying a board saying 'The End is Near'.
Another user put up a post with pictures of Pakistani politician and former cricketer, Imran Khan smiling with the message "When you use blackberry messenger and aren't affected by whatsapp being down".