The Ibrox giants are seeking re-admission to the Scottish top flight following their relaunch under a new holding company but need eight of the league's 12 clubs to vote in their favour ahead of Wednesday's deadline.
However, Motherwell have seemingly sealed the Glasgow outfit's fate after 82% of their ‘Well Society - a trust set up to encourage fan ownership of the club - voted against newco Rangers joining the league.
The Lanarkshire club had previously stated that the outcome of that vote would dictate their stance on the matter, meaning Rangers now have little hope of readmission.
A meeting between the league's members took place on Tuesday but ended prematurely with SPL chief executive David Longmuir imploring members to speak to everyone involved at their respective clubs.
He said: "It was important clubs are now in a more informed position to go back to their boards and fan groups and take that factual information to make informed decisions.
"It is time to reflect on the scenarios and consequences and I want to give them space to do that. We haven't even decided on if and when we would have a vote.
"It's time to give the clubs a chance to engage with their fans and work out the right strategy. Votes will come if required."