"possible refusal" is correct and often used in written English.
For example, you could use it in a sentence like: "I will consider the offer, but I am not ruling out a possible refusal."
In Belgium the sanction royale has the same legal effect as Royal Assent; the Belgian constitution requires a theoretically possible refusal of royal sanction to be countersigned — as any other act of the monarch — by a minister responsible before the House of Representatives.
The estimated total sample size after considering possible refusal or non-participation was 1600 participants (800 in each site).
Meanwhile, we over-sampled 30% of children to compensate for possible refusal and loss to follow-up.
In three cases, children's refusal to blood withdrawal, or possible refusal, had an effect on research protocols.
However, the number was adjusted upwards in anticipation of attrition from school absenteeism and possible refusals.
However, this number was increased by 20.0% (n = 1870) in order to compensate for possible refusals.
To allow for possible refusals and drop-outs, we approached 196 dentists, of which 195 consented to the study.
It is also possible that refusal to participate is higher among violence-prone than their non-violence prone counterparts.
Since it is possible that refusal is associated with poor guideline adherence, actual guideline adherence may be worse than that found in this study.
In the second part we asked the participants to consider the decision making process and relatives' possible regret about refusal, thereby focusing on possibilities for discovering and preventing this regret.
The belief that blacks have been given too much is made possible by the refusal to countenance how much was actually taken away in the first place.
