The phrase "impossibility of return" is correct and usable in written English.
It can be used in contexts discussing situations where returning to a previous state or place is not feasible.
Example: "After the decision was made, the team faced the stark reality of the impossibility of return to their former strategy."
Alternatives: "point of no return" or "irreversible situation."
He reached the junction of the Napo and Marañón rivers, where his group persuaded him of the impossibility of returning to Pizarro.
He asked Sorger for a handkerchief and said, "Listen to me for a while," speaking of "business failure," "inability to compete," "wife and children," and the "impossibility of returning to Europe".
"In the instance of sanctions being applied to stated institutions, we will have to declare the impossibility of returning those loans which were given to Russian institutions by US banks," RIA quoted Glazyev as saying.
In contrast to such a reading however, is Irigaray's own insistence on the impossibility of returning to a body outside of its representation within culture.
It was a shattering event for Hemingway writer, because it marked the final break between the United States and Cuba, and therefore the impossibility of his return to the home he loved.
The broadened scope of federal lawmaking and rulemaking in the past 75 years has guaranteed the impossibility of any return to the golden age of Glass-Steagall, however.
In preparation for future missions beyond Low-Earth orbit (LEO), medical concepts of operations are being developed to ensure adequate support for the new mission profiles: increased distance, duration and communication delays, as well as impossibility of emergency returns and limitations in terms of medical equipment availability.
The retreat from Dunkirk saved British lives, but it signalled the near impossibility of a British return to continental Europe, and opened up the real prospect of a German invasion of the British mainland.
Patterns of profit and investment are changing fast, as people recognise the impossibility of expecting limitless returns from limited resources in our world.
The significance of fixed income can be seen in another Smith chart, which underscores the impossibility of even having a positive rate of return unless you were 40% bonds.
