Rooney, 31, apologised this week after being pictured looking the worse for wear as he mingled with guests during a late-night wedding party at the England team hotel last weekend.
British press reports claim Mourinho was angry with the FA for not supervising Rooney more closely and he appeared to suggest the striker could have been looked after more carefully.
"The only thing I say is that (when) the player goes to the national team, he belongs to the national team," Mourinho said.
"You know? Your friend lent you a pencil. You have to take care of the pencil better than if it was your pencil.
"So I think when one day if I become a national team manager, I will try (to act like that).
"I am not saying that I will be successful on that, and I am not being critical with Gary (England interim manager Gareth Southgate) or anyone.
"I get the occasion to wish Gary the best of luck, but I think you have to build something to protect what is not yours, what someone lends you."
- Koeman criticism -
====================
While Mourinho said Rooney would be "ready" for Saturday's game against Arsenal after withdrawing from England duty with a minor knee injury, he conceded the furore had affected his captain.
"Even if you build a kind of wall around you to try to feel protected from what people write about you or think about you, the wall has always points of fragility," said the United manager.
"It has always some little holes and we are not steel. We are flesh and blood, so I think it has an effect."
"I would have a great answer for you. I don't want to because I don't want to speak about it," Mourinho told reporters at United's training base west of Manchester city centre.
"But if you go one by one, to see where these 23 players were, some of them were in worse places than the hotel bar."
Mourinho also took issue with Everton manager Ronald Koeman after the Dutchman expressed an interest in signing United's out-of-favour Dutch winger Memphis Depay.
"The player belongs to another team, the player belongs to another manager, no comments at all.
"I think that is the ethical answer and when we are always worried about ethics and respect and rules, I just said that if it was me making those comments about an Everton player, I would be in trouble.
Disclaimer: No Business Standard Journalist was involved in creation of this content
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
