At 5 pm on Saturday, an informal meeting with NATO foreign ministers will begin in Berlin.
No formal decisions will be made, but the agenda is the situation in Ukraine and the security situation in Europe.
Sweden's Foreign Minister Ann Linde (S) and Finland's Foreign Minister Pekka Haavisto are also invited and will attend, although it is not yet clear whether the countries will apply for membership.
The meeting takes place the day after Turkish President Recep Tayyip Erdogan openly stated that it would be a "mistake" to allow Sweden and Finland to join NATO.
He also called the Scandinavian countries a "guesthouse for terrorist organizations" and stressed that they do not view positively that the two countries are approaching a membership application to the Defense Alliance.
"Linde should talk to his Turkish colleague"
Ann Linde responded on Friday to Erdogan's statement in which she stated that no criticism of a Swedish NATO application had previously been made during talks with Turkey.
She will now address the issue in connection with the ministerial meeting, where she also hopes for "positive information" from all 30 member countries in the event of a Swedish application.
"Since we did not receive this signal officially, but on the contrary, I will have the opportunity to talk to my Foreign Minister colleague on Saturday," Linde told SVT Nyheter on Friday.
According to SVT's European correspondent David Boati, the issue will be important for Sweden and Finland.
- It's likely to come up.
Not least, Linde should talk to her Turkish colleague and see how serious this is.
Do Sweden and Finland need to take into account that Turkey may put sticks in the wheel if you apply ?, says David Boati.