"Jason has not kicked a ball since the first weekend in May and when we named this current Wales squad we presumed his future would have been resolved," he said.
"There is not much point in him being here, but as things stand his inclusion for our Euro 2008 qualifying opener against the Czech Republic is very doubtful.
"Jason's absence will not be held against him," Toshack said, before going on to say, "He was not with us in San Sebastian, he didn't play against Slovenia in Swansea last year, he's not here again this time.
"Obviously, if this continues, there will come a time when we say, 'Hey, enough is enough.'"
"Jason not having done any pre-season training is not in anybody's interest. I'm led to believe that by the end of the week he will definitely be training somewhere.
"But, look, I don't want to say anything else on the subject. I spent an hour and a half at a Press conference last week talking about a whole range of issues.
"Yet the only thing I saw in print the following day were articles about Koumas and John Hartson. I find that disappointing - I would rather focus upon the people here to play for Wales.
"Every one of the players we picked, Jason Koumas and the injured Dave Partridge apart, are here with us. That's what I want to focus upon."