Short answer. Yes. Article 1614 of the Civil Code allows each co-owner who sold their undivided share separately to exercise the right of repurchase independently for their own share alone. The buyer cannot compel you to redeem the whole co-owned property — your right and obligation is limited to the share you sold.
What the law says
Each one of the co-owners of an undivided immovable who may have sold his share separately, may independently exercise the right of repurchase as regards his own share, and the vendee cannot compel him to redeem the whole property.
Civil Code, Article 1614 — Co-Owner Selling His Share Separately. Read the full provision →
The right to repurchase only your own share
Article 1614 states the rule plainly: "Each one of the co-owners of an undivided immovable who may have sold his share separately, may independently exercise the right of repurchase as regards his own share, and the vendee cannot compel him to redeem the whole property." If you sold only your undivided fraction — say, a one-third interest in a lot co-owned with two siblings — you can exercise a conventional right of repurchase for that one-third interest alone. The buyer cannot insist that your repurchase cover the other two-thirds still held by your siblings.
Why the buyer cannot demand you redeem everything
The buyer only ever acquired what you sold: your undivided share. They do not hold the shares of your co-owners, which were never part of the transaction. Requiring you to redeem the entire property would force you to buy out interests you never sold and never owned alone, which would be plainly unjust. Article 1614 prevents that result. The buyer's remedy for any difficulty arising from holding an undivided share in a co-ownership lies in partition or sale — not in compelling you to take back more than you conveyed.
Independent exercise means no co-ordination required
The word independently in Article 1614 matters. If multiple co-owners each sold their respective shares separately, each can exercise repurchase on their own timeline and for their own share without needing the others to act simultaneously. You do not have to wait for your siblings to decide whether they want to repurchase their shares before you can repurchase yours. Conversely, you cannot be held up because a co-owner who sold a different share has not yet acted. Each repurchase stands on its own.
Conditions and timing still apply
Article 1614 governs who can redeem and how much — but the general rules on the right of repurchase still control when and how. The repurchase must generally be made within the period agreed in the contract of sale with the right to repurchase, and you must tender the repurchase price as stipulated. If the contract did not specify a period, the Civil Code sets outer limits on how long the right remains open. Article 1614 does not extend or modify those conditions; it simply ensures that exercising the right is limited to your own share, not forced to encompass the whole immovable.