The shock decision, announced at a meeting here, means that the planned two-Test tour of the Caribbean, scheduled for April and May, will now not take place.
It is the second time in two years that Zimbabwe Cricket, split by ongoing claims of racism, corruption and player strikes, has been suspended from Tests.
A similar decision was taken in 2004 as results and performances on the field became increasingly humiliating.
"The interim board have decided to suspend Zimbabwe's participation in Test matches until early next year," ZC Interim Board Chairman Peter Chingoka said in a statement.
"The decision to suspend participation in Test matches was reached by ZC after consideration of the recent performances by the national and 'A' teams.
"The young teams remain full of potential and hopes abound for their development into a strong and competitive performer in the Test arena.
"ZC are now putting in place a programme to galvanise the development of the Zimbabwe squads. They will work with other Test nations and the ICC itself to realise this objective.
"While the side goes through the programme to prepare adequately for the rigours of Test cricket, ZC have no doubt the team will be competitive in their ODI commitments under the Future Tours Programme."