Mmm… No smallprint on their website:
“Standard Limited Frame Warranty
As standard, all Marin 2007 – 2011 frames are supplied with a 3 year Limited Warranty covering defects in materials and workmanship. If accepted for a Warranty claim the frame will be repaired or replaced free of charge. Crash damage, damage caused by poor maintenance, fair wear and tear, delivery and labour (i.e. frame swaps) are not covered by this warranty.”
There’s added bumf about the upgraded warranty but not for the standard one (the upgraded one states “allowing us to supply the original owner with an equivalent, more contemporary product, in the event that an original replacement is not available.”) Not directly relevant, but it’s the only mention in the warranty doc of replacements.