The report published on Tuesday is based on a leaked official document looking into the effects of the refugee influx on Germany.
It states that 268,000 Syrian refugees currently have the right to bring their families to Germany.
Asylum seekers who are given full refugee status have the right to bring their families to Germany immediately. The families must not make asylum requests and are not included in official asylum figures, Die Welt reports.
But many thousands more Syrians will not be able to bring their families to Germany, as the Federal Office for Migration and Refugees (BAMF) has only offered them subsidiary status.
This lower-tier status only provides a temporary residence permit good for one year and subject to renewal, and bars the application for family members to be allowed entry to Germany until March 2018. The process itself can take another two years.
Up until December 2016, 32,551 refugees - the overwhelming majority of them Syrians (28,444) - filed legal complaints last year to gain recognition as refugees under the definition set out by the 1951 Geneva Conventions.
The legal complaints came after BAMF started mostly granting only subsidiary protection to Syrians in March 2016.