Fabius and officials in the P5+1 group comprising the United States, Russia, Britain, France, Germany and China will "evaluate the situation" in the talks, which aim to reach a definitive accord with Iran by July 20, according to the source.
The source did not say which other foreign ministers would attend.
Final negotiations to secure a historic accord to guarantee the peaceful nature of Iran's nuclear programme in exchange for the lifting of sanctions against Tehran began on July 3 in Vienna.
France has described the negotiations as "difficult" and on Tuesday said no major issues had been resolved.
EU foreign policy chief Catherine Ashton, who is leading the talks, said earlier this week she was considering asking foreign ministers to attend.
On Tuesday Iranian news agency IRNA reported that foreign ministers from the five permanent members of the UN Security Council would arrive in Vienna later this week.
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
