The phrase "due to difficulty" is correct and can be used in written English.
You can use it when referring to a difficulty that caused certain results or outcomes. For example, "I was unable to finish the race due to difficulty."
One participant reported dropping out of the trial due to difficulty finding time to practice.
Freshmen are not allowed to enroll due to difficulty level and enrollment capacity.
Inflation has risen to 25%, and Iranian businesses are carrying cash to pay for transactions, due to difficulty opening foreign currency accounts with non-Iranian banks.
For instance, it said bleeding disease agents like Marburg were unlikely "due to difficulty in acquiring pathogen, safety considerations and relative instability".
However, up to date, efficient evaluation technique is still scare mainly due to difficulty in controlling of micropits.
The use of spectrum opportunities can often require stochastic approaches due to difficulty in predicting their appearance.
This information gap is principally due to difficulty in studying these organisms because of their small size and hard-to-distinguish morphology at the species taxonomic level.
The Nuclear Regulatory Agency over the weekend declared a "hazardous event" due to difficulty that Duke Energy workers were having getting to the company's two Brunswick nuclear reactors.
This is partly due to difficulty in preparation of single crystalline TMD films with large uniformity.
Methods: We prospectively registered 26 tracheotomized patients due to difficulty in weaning.
This was due to difficulty in diagnosis in presence of posterior synechiae and significant vitritis.
