The phrase "a deep concern of" is correct and usable in written English.
It can be used when discussing issues or topics that are of significant worry or importance to someone or a group.
Example: "Climate change is a deep concern of many scientists and environmentalists around the world."
Alternatives: "a significant worry of" or "a major issue for".
Certainly such a prospect is a deep concern of many American liberals.
For example, for all the talk of budget tightening, he said the state needed to do something to take care of public schools that have been battered by years of cuts, a deep concern of Californians.
"So it is symbolically important as well as representing a deep concern of the British people".
The plight of immigrants has always been a deep concern of Cunningham's.
Even his early madrigals show a deep concern for intensity of expression, as in the Petrarch setting for five voices Hor che'l ciel e la terra.
They said they were acting out of a deep concern for the fiscal affairs of the states, which they thought received insufficient attention in Washington.
We might be relieved and grateful to the Governor for expressing such a deep concern for the safety of women, if it wasn't so obvious that his deep ideological opposition to abortion was the fundamental reason for the legislation.
And yet, never once was there any mention of an analogous event where the tables were turned and it was we, the United States, who acted with outrage and a deep concern to the point of near mutual annihilation.
In addition to acknowledging the mothers' challenges, many health workers in the public health sector expressed a deep concern for the situation of their institutions [DP1].
This sense of sadness comes from a deep concern for the well-being of others.
Participants who attempted to 'rescue' bats did so because of a deep concern for the bat's welfare.
