The phrase "a discouraging note" is correct and usable in written English.
It can be used when referring to a message or comment that conveys a sense of disappointment or negativity.
Example: "The report ended on a discouraging note, highlighting the challenges we still face in the project."
Alternatives: "a negative tone" or "an unpromising message".
That, too, was a discouraging note to Washington incumbents facing tough re-election fights.
But on a discouraging note for Mr. Gore, Mr. Bush's backers seemed more intransigent, while the vice president's backers seemed more inclined to back down.
The opening-game loss was a "discouraging note" to begin the season in the eyes of at least one commentator.
Such banks distributed nearly worthless currency backed by questionable security (e.g., mortgages, bonds) and were located in inaccessible areas to discourage note redemption.
CEO Robert Iger while disappointed did not sound discouraged, noting the strength of Disney's brand and business.
For science educators, it is discouraging to note the persistent acceptance of the Lamarckian mechanism of evolution into level 4 in just over a tenth of the students.
On the other hand, it is also discouraging to note that many patients with regional pain did not get relief from medication as major strides have been made to aggressively treat neuropathic pain with tricyclic antidepressants and anticonvulsants such as gabapentin [ 20].
Back then, they removed the privilege and crafted a replacement compromise bill after negotiations with the proposal's backers, who felt discouraged but noted they at least forced the House to acknowledge U.S. culpability in the devastating conflict.
This, and the other two differences (Embarrassed and Discouraged), were noted for follow-up in later studies.
As for discouraging bribery, he notes that the increases are "nothing compared to what officials can put in their pockets through corruption.
When Mirzakhani was in sixth grade, in Tehran, a teacher discouraged her interest in mathematics, noting that she was not particularly talented, not at the top of the class.
