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                                      AIMCO
                             AIMCO PROPERTIES, L.P.
                    C/O RIVER OAKS PARTNERSHIP SERVICES, INC.
                                  P.O. BOX 2065
                      S. HACKENSACK, NEW JERSEY 07606-2065
                        (888) 349-2005 OR (201) 896-1900

                                 August 15, 2000

              IMPORTANT INFORMATION FOR IRA HOLDERS IN CONSOLIDATED
              CAPITAL INSTITUTIONAL PROPERTIES/3 "THE PARTNERSHIP"
              ====================================================

Dear Limited Partner:

Re: Supplement to Offer to Purchase, dated July 24, 2000

         We have amended our offer to purchase to reimburse IRA holders of units
up to $50 for expenses of tendering your units in our offer. Our offer price
remains unchanged at $106.00 per unit. We believe our offer provides you with an
opportunity to gain liquidity for your investment which you may not have had
previously and to eliminate the cost and record keeping associated with limited
partnership tax reporting if we purchase all of your units.

         If you tender your units in response to our offer, we will pay any
transfer fees imposed for the transfer of units by your partnership. We will now
also pay up to $50 of fees for tendering your units which are charged by any
custodian or other trustee of any Individual Retirement Account or benefit plan
which is the owner of record of your units. Although the fees charged for
transferring units from an Individual Retirement Account vary, such fees are
typically $25-$50 per transaction. However, you will have to pay any additional
fees and any other fees and expenses, including any fees or commissions imposed
by your broker, and any taxes that apply to your sale. The custodian for your
IRA account should bill us for such fees by sending an invoice to the
Information Agent.

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         There are advantages and disadvantages to you of accepting or declining
our offer. The terms of the offer are more fully described in the offer to
purchase and enclosed letter of transmittal, which you should read carefully.
These documents describe the material risks and opportunities associated with
the offer, including certain tax considerations. LIMITED PARTNERS ARE URGED TO
READ OUR OFFER TO PURCHASE AND THE RELATED MATERIALS CAREFULLY AND IN THEIR
ENTIRETY BEFORE DECIDING WHETHER TO TENDER THEIR UNITS.

         The general partner of your partnership, which is our affiliate, has
certain conflicts of interests in connection with the offer. The general partner
is remaining neutral and makes no recommendation as to whether you should tender
or refrain from tendering your units in any offer. Although the general partner
believes that our offer is fair, the general partner also believes that you must
make your own decision whether or not to participate in any offer, based upon a
number of factors, including several factors set forth in the offer to purchase.

         You should be aware, however, that, as with any rational investment
decision, we are making our offer with a view to making a profit.

         If you have not already sent in your Letter of Transmittal to accept
our offer, please remember, the enclosed Letter of Transmittal must be received
before the expiration of our offer. If you have already sent in a Letter of
Transmittal you do not have to take any further action tender your units. If you
have any questions or need assistance in completing the Letter of Transmittal,
please contact our information agent, River Oaks Partnership Services, Inc.,
toll free, at (888) 349-2005.


                                          AIMCO Properties, L.P.


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