The 30-year-old had been named in Eddie Jones's squad for England's June 10 and 17 tests in Argentina but was dropped from a revised 32-man list this week given the likelihood of a suspension.
Wood was sent off during last Friday's European Champions Cup playoff win over Stade Francais for stamping on fullback Djibril Camara.
European Professional Club rugby said in a statement that an independent disciplinary committee hearing ruled there had been "reckless contact" with Camara's head.
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The committee decided a 12-week ban would be appropriate but halved it after taking into account Wood's guilty plea, expression of remorse and good disciplinary record.
The sanction will include Northampton's pre-season warm-up matches, with Wood free to play again on Aug. 28.
(Reporting by Alan Baldwin, editing by Ed Osmond)
