Speaking to Sky Sports ahead of Sunday's game, Ross said: "My understanding is that it is highly likely Josh will move from the club.
"We have to prepare for that eventuality - it looks like that will happen soon.
"There has been strong interest, that I think the club are trying to finalise this week, one way or another.
"I don't think it has been a brilliant situation for Josh - he is a young man who has only just turned 19 years old and it's a lot to deal with.
"I think for us and him it is better if we draw it to a conclusion, one way or another.
"Obviously I would be delighted if he was still part of our club but it looks most likely he will move on.
"For me as a manager you would like that to have been dealt with earlier - but we are fortunate to have another excellent left-back in our squad in Lewis Stevenson."
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