* UN refugee agency says "asking Europe to do more" * Nearly 3 mln Syrians in Leba**n, Jordan, Turkey, Iraq (Adds more figures from UNHCR) By Tom Miles GENEVA, July 11 (Reuters) - Europe must open its doors to more Syrian refugees, having welcomed only a "miniscule" number while Syria's neighbours have reached "saturation point", the U.N. refugee agency UNHCR said on Friday. Syrian refugees, whose numbers are set to pass 3 million in the next few weeks, are almost all in Leba**n, Jordan and Turkey, with smaller numbers in Iraq and Egypt.