Uefa have called on member associations to agree to close the transfer window in October.
The governing body have been meeting via videoconference to discuss a number of measures for the 2020/21 season.
On Wednesday they announced changes to the Champions League, Europa League and Euro 2020 qualifiers which impact the Scotland national team, as well as Celtic, Rangers, Motherwell and Aberdeen.
Now, proposed changes to the transfer window could affect clubs across Scotland.
In a statement put out this morning, Uefa said: “The deadline for player registration for the group stage of the 2020/21 UEFA club competitions has been set to 6 October 2020. As a result, the UEFA Executive Committee called on all member associations to adopt a harmonised end date to the upcoming summer transfer window, with this date set as 5 October 2020.”
The transfer window in Scotland was scheduled to open on 10 June but it is yet to be opened by the SFA, according to The Athletic.
A key issue is that Fifa only allow a window to be open for 12 weeks. Due to the coronavirus pandemic it was set to see leagues across Uefa operate on different dates.
Uefa’s call for a harmonisation will require leeway from Fifa or the member associations to hold off on opening their window.
For the Scottish transfer window to close on 5 October and last 12 weeks, it would mean it won’t be able to open until 13 July.