"Every country is responsible for the security of its foreign embassies," Rouhani said in a speech to mark a week of events on justice in Iran.
"People want to know how a bunch of rogue individuals who attacked a foreign embassy in breach of the law and against the country's public security... Will be dealt with by the judiciary," he said.
The trial of 48 people is due to open in Tehran on July 18.
The Gulf kingdom and some of its allies the next day severed diplomatic relations with Iran.
Rouhani said a "transparent" judiciary was needed to ensure "people's trust as well as the world's trust in our country".
"Today we need a growth in investment for economic prosperity and employment of our youth. We must give assurance to all entrepreneurs and investors that their capital is safe and encourage them to invest," he added.
"Like the British embassy attack before it, this was against the country (Iran) and Islam, and I didn't like it," Khamenei said in January, referring to a mob ransacking Britain's embassy in Tehran in 2011.
Saudi Arabia and Iran are locked in a fierce competition for regional influence, backing opposing sides in a number of conflicts.
The two countries have also failed to conclude an agreement for Iranian pilgrims to attend this year's hajj in Saudi Arabia in September.
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
