Answers to the three components of the question are as follows. During the time period in question there have also been contacts between Canadian and Estonian fisheries officials. However, as requested, this response sets out diplomatic contacts in Estonia.
On September 26, 2001 the Canadian embassy contacted Estonian fisheries authorities for an exchange of views on multiple agenda items for the September annual meeting of the Northwest Atlantic Fisheries Organization, NAFO. Note that the NAFO meeting was later postponed in the wake of September 11 events.
On January 15, 2002 the Canadian embassy contacted Estonian fisheries authorities to convey Canadian priorities for the NAFO special meeting scheduled for the end of January.
On March 6, 2002 Canada's ambassador to Estonia called on Estonian interlocutors in the Ministry of Foreign Affairs, equivalent to a Canadian assistant deputy minister, to present Canadian information indicating serious overfishing by Estonia of 3L shrimp and underline that Canadian port closures were likely if activities were not rectified in short order.
On March 14, 2002 Canada's ambassador to Estonia called on Estonian interlocutors in the Ministry of Foreign Affairs, equivalent to assistant deputy minister level, to receive Estonian response to the demarche of March 6. Estonians provided more detailed information on the activities of their fleets.
On April 5, 2002 the Canadian embassy received a phone call from Estonian interlocutors in the Ministry of Foreign Affairs, equivalent to Canadian assistant deputy minister level, proposing that an Estonian delegation travel to Canada to discuss Estonian 3L fishing activities.
On April 9, 2002 the Canadian embassy contacted interlocutors in the Estonian Ministry of Foreign Affairs to provide courtesy advance notice of pending announcement of Canadian port closures to Estonian fishing vessels.