The phrase "a new snag" is correct and usable in written English.
It can be used to refer to a new problem or obstacle that has arisen in a situation or process.
Example: "We were making good progress on the project, but then we encountered a new snag that set us back a few days."
Alternatives: "a new hurdle" or "a new issue".
Last spring, the Bush administration's campaign to vaccinate half a million health workers for smallpox hit a new snag.
[Page A1.] Deutsche Telekom Shares Punished The German government's trouble-prone campaign to oust Ron Sommer as the chief executive of Deutsche Telekom hit a new snag.
Efforts to enact the annual military policy bill hit a new snag as House Republicans insisted on using that legislation to advance campaign finance restrictions on independent advocacy groups.
Virginia's troubled budget process made a breakthrough Wednesday only to hit a new snag, as Republicans got a Democrat to agree to vote with them, but then lost a GOP senator when his wife was hospitalized.
BLOOMBERG NEWS Fresh Troublele for Goldman on Islamic Bonds | A $2 billion Islamic bond issuance by Goldman Sachs encountered a new snag when it turned out that at least two religious scholars named on the prospectus as potential approvers had not even seen the documents, Reuters reports.
Andrew Restuccia and Josh Dawsey: "President Donald Trump's effort to fill hundreds of vacant jobs across the federal government has hit a new snag: Russia.
The new snag developed over a British proposal that the European Economic Community should accord special favors to India and Pakistan, two of the leading members of the British Commonwealth.
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But there were also new snags in the drive to get more troops and aid to Iraq.
New snags replaced many of those lost reducing the net snag losses to 12% (2.0 ha−1) for plots burned once, and 3% (0.5 ha−1) for plots burned twice and unburned plots.
