UK Visa Refused Under "Suitability"? What the Actual Rule Says

If your UK visa or entry clearance was refused and the letter mentions "Part Suitability" of the Immigration Rules, you were refused under one of roughly 19 named grounds — not a vague catch-all. The rule itself is public. Most refusal letters just don't quote it.

What "Suitability" actually is

Part Suitability replaced what used to be called "Part 9: grounds for refusal." It applies to almost every UK route, and it sets out when an application must or may be refused — separate from whether you meet the specific requirements of your visa category. You can meet every requirement of your route and still be refused under Suitability if one of its grounds applies.

The grounds that come up most often

Previous breach of immigration law (SUI 11). This is the most common one people don't expect. If you overstayed a previous UK permission — even briefly — your new application can be refused, and a re-entry ban of 12 months to 10 years can apply depending on how you left and whether it was voluntary. A disregarded period exists (30 days or less if the overstay began after 6 April 2017), but many applicants don't realise the clock started the day their old permission expired, not the day they noticed.

Deception and false representations (SUI 9 and SUI 10). This isn't limited to forged documents. Providing information that turns out to be wrong — even through an agent, and even if you didn't know it was wrong — can trigger this ground. It's why using an unregulated "consultant" who fills in details you never checked is a real risk, not just a quality issue.

Criminality (SUI 5). A custodial or suspended sentence of 12 months or more must lead to refusal. Shorter sentences and non-custodial convictions can (not must) lead to refusal, which is where representation and context actually matter.

Non-conducive grounds (SUI 3). The broadest ground — refusal because presence in the UK "is not conducive to the public good" based on conduct, character, or associations, even outside formal convictions.

Why this matters before you reapply

A refusal under Suitability doesn't always mean the door is closed for good — but reapplying without understanding which specific ground applied, and why, tends to produce the same result. The rule is public and specific. Reading the actual paragraph your refusal cites is worth more than any generic "here's why visas get refused" article, including this one.