The phrase "a worrying development for" is correct and usable in written English.
It can be used when discussing a situation or event that raises concern or anxiety for a particular group or individual.
Example: "The recent increase in cyberattacks is a worrying development for businesses that rely heavily on digital infrastructure."
Alternatives: "a concerning trend for" or "a troubling situation for".
A worrying development for Somali's neighbours is al-Shabaab's growing influence in the region.
The impacts of such dams are not always clear, but their existence, and with foreign support, is a worrying development for Egypt.
Nobody has been charged over the later find, but it signalled a worrying development for the security forces on both sides of the border.
The poll's findings are a worrying development for Ms Merkel and her ruling coalition of conservative Christian Democrats and liberal Free Democrats.
France saw a rise in reported Islamophobic incidents following the attacks, a worrying development for the estimated 4.7 million people who composed western Europe's largest Muslim community.
If true, it opens up a worrying development for news organisations covering wars and conflicts: now they could be targeted simply for reporting a side of the story that one party wants suppressed.
A worrying development of antimicrobial drug resistance in S. aureus has been the emergence and geographic extension of reduced susceptibility to vancomycin, which at one time was the reliable backup therapy for MRSA infections (references 51 53 in Technical Appendix).
If by exciting you mean 'really very long,'", said Papa Noel – both Bafta winner of the night and host – in a slightly worrying development for the BBC (telling the truth about how bad things are).
In a more worrying development for the News Corporation, Ofcom, the British media regulator, has said it is broadening its investigation of whether the company is "fit and proper" to hold a broadcast license at all.
Iran's filling of the vacuum created by the departure of the United States military has been an extremely worrying development for Saudi Arabia and some other Arab states, who have seen their efforts to fight proxy wars with Iran largely fail.
